MAGNETKOPFANORDNUNG, DESSEN HERSTELLUNG UND MAGNETPLATTENGERÄT

Dünnfilm-Magnetkopf mit schmaler Spurbreite und dessen Herstellungsverfahren

DUENNFILM-MAGNETKOPF MIT EINER FLACHEN SCHREIB-/LESEPULENWICKLUNG

A thin-film magnetic head composed of layers contains a conductor which conducts the magnetic flux. The conductor comprises two magnetic arms with end pieces which form successive magnetic poles and delimit a space beyond the region of these end pieces through which a flat, single- or multi-layered write/read wire-wound coil extends. To ensure minimal losses from the coil, in the apical region (S) of the coil (17) facing the end pieces (10, 11) the width (Ba to Bi) of the conducting track (18) from other external coils (17a to 17i) is greater that than from similar internal coils (17j to 17p).

STABILISIERUNGSSCHICHT FÜR EINEN SPIN- DREHMOMENT- OSZILLATOR (STO)

In einer Ausführungsform umfasst ein Spin-Drehmoment-Oszillator (STO) eine Referenzschicht mit einer Magnetisierung, die zu einer freien Rotation auf gleicher Ebene fähig ist, eine Feldgenerierungsschicht (FGL), die wenigstens einen Magnetfilm mit einer Magnetisierungsvorzugsebene effektiv in einer Filmebene umfasst, wobei eine Magnetisierung der FGL zu einer Rotation auf gleicher Ebene fähig ist, und eine Stabilisierungsschicht (STL), die an einer Seite der FGL entgegengesetzt zu der Referenzschicht positioniert ist, welche STL einen Magnetfilm mit einer Magnetisierungsvorzugsebene effektiv in einer Filmebene umfasst, wobei eine Magnetisierung der STL zu einer Rotation auf gleicher Ebene fähig ist, und wobei ein Produkt einer Sättigungsmagnetisierung der STL multipliziert mit einer Dicke der STL kleiner ist als die Hälfte eines Produkts einer Magnetisierung der FGL multipliziert mit einer Dicke der FGL.

THERMOMAGNETISCHE AUFZEICHNUNGSVORRICHTUNG

Dereferenzierungsdatenstrukturen zum Verwalten von Dateisystem-Metadaten

Es sind hier Systeme, Verfahren und Software beschrieben zum Verwalten von Dateisystem-Metadaten in einer Datenspeicherungsvorrichtung. In einem Beispiel umfasst eine Datenspeicherungsvorrichtung eine erste Speicherzone, eine schuppige Magnetaufzeichungs(SMR)-Zone und ein Speichersteuerungssystem. Das Speichersteuerungssystem ist eingerichtet zum Unterhalten von Dateisystem-Metadaten an einem Metadatenort der ersten Speicherzone für Nutzdaten in der SMR-Zone. Das Speichersteuerungssystem ist weiterhin eingerichtet als Reaktion auf Erfüllung einer Nutzungsbedingung für die Dateisystem-Metadaten an dem Metadatenort, zum Identifizieren von Metadatenorten in der SMR-Zone zum Umleiten und Speichern der Dateisystem-Metadaten. Das Speichersteuerungssystem ist auch eingerichtet zum Unterhalten einer Derefferenzierungsdatenstruktur an dem Metadatenort der ersten Zone, die die Metadatenorte in der SMR-Zone mit den Dateisystem-Metadaten korreliert.

ABGESCHIRMTE SCHREIB-LESEKOPFSTRUKTUR FUER DOPPELSPURIGE AUFZEICHNUNG.

HERSTELLUNGSVERFAHREN EINES MAGNETISCHEN WANDLERS MIT MEHREREN KOEPFEN.

MAGNETKOPF FUER DIE DURCHFUEHRUNG EINER MAGNETISCHEN QUERAUFZEICHNUNG

Thin-film magnetic head for a recording medium to be magnetised longitudinally or perpendicularly

The thin-film magnetic head includes two magnet legs of laminated construction, the magnet poles of which are arranged one behind the other, seen in the direction of movement of the head, forming a gap of predetermined width. It is intended with this magnetic head to be able to perform a read and write function both on the principle of perpendicular (vertical) magnetisation and on the principle of longitudinal (horizontal) magnetisation with high efficiency in each case. For this purpose, it is provided according to the invention that the two magnet legs (9, 10) have in each case at least two magnetic layers (9a, 9b, 10a, 10b) of materials of different reversible permeability ( mu a, mu b, mu a', mu b'), the magnetic layers (9b, 10a) of the at least one material of the comparatively greater permeability ( mu b, mu a') bounding the gap (13). ...

Zweifach eingekerbte Abschirmungs- und Pol-Struktur zur Verringerung des Streufeldes in einem magnetischen Kopf

Perpendicular magnetic write head having a hull shaped stitched pole

MAGNETIC RECORDING AND REPRODUCTION

Thin-film magnetic head for perpendicular magnetic recording

Magnetic recording

A magnetic recording method for recording a digital signal in the form of a two dimensional plane on a magnetic recording medium like a magnetic tape, a magnetic disc etc. Magnetic flux is generated according to a shape of the surface of the magnetic recording head facing the recording medium. Thus, digital information is recorded on the recording medium in the form of two dimensional information according to the shape of the surface of the magnetic head. A magnetic recording medium on which two dimensional information has been recorded by the above recording method, and a reproducing method for reproducing the recorded information on said magnetic recording medium are also disclosed.

Magnetic recording head

A concave portion 29e is formed on the end surface of a main magnet pole layer 29 on the trailing side. A convex portion 33c is formed on the end surface of a return yoke layer 33 on the leading side, which opposes the concave portion formed on the end surface of the main magnet pole layer on the trailing side, and the distance (gap length) between the main magnet pole layer and the return yoke layer in the direction of the film thickness is constant. Consequently, the magnetic field generating from the main magnet pole layer toward the recording medium is appropriately prevented from isotropically spreading in the trailing direction, and the width of magnetization reversal between the recording patterns, which are magnetized reversely from each other, can be reduced over the entire area.

Stabilizing layer for a spin torque oscillator (STO)

A Microwave assisted magnetic recording (MAMR) head has a spin torque oscillator (STO) 600 including a reference layer 602 having a magnetization that is capable of free in-plane rotation. The STO also includes a field generation layer (FGL) 606 including at least one magnetic film having an easy magnetization plane effectively in a film plane, wherein a magnetization of the FGL is capable of in-plane rotation, and a stabilizing layer (STL) 610 positioned on a side of the FGL opposite the reference layer. The STL includes a magnetic film having an easy magnetization plane effectively in a film plane, wherein a magnetization of the STL is capable of in-plane rotation. The product of a saturation magnetization of the STL multiplied by a thickness of the STL can be less than half a product of a magnetization of the FGL multiplied by a thickness of the FGL.

Magnetic head

Magnetic head.

The magnetic head 10 is for recording and/or reading digital or analog data on a recording support 11, by magnetising the magnetisable layer 12 of this support perpendicularly. The head comprises a coil 15 which generates a magnetic flux perpendicular to the magnetisable layer, and a first magnetic pole 20 disposed inside the coil and constituted by a thin layer of material of high magnetic permeability disposed on a non-magnetic support plate 21, and of a form which converges towards the recording support in such a manner as to have a very small pole surface 22 in which the entire magnetic flux generated by the coil is concentrated. A second magnetic pole 25 of annular form is disposed coaxially and externally to the coil 15 and has a pole surface in the form of a circular ring which faces the magnetisable layer of the support and is many orders of magnitude larger than the pole surface 22 of the first magnetic pole. ...

Perpendicular magnetic recording head having return path layer and gap adjusting layer

Magnetic recording media

A magnetic recording medium suitable for use in a recording system employing a magnetic recording transducer or head of the single-pole type which operates in a perpendicular magnetization mode comprises a non-magnetic base supporting a layer of low coercive force material formed on the base and which underlies a magnetic recording layer. The magnetic recording layer which faces the magnetic recording transducer or head is formed of an alloy composed mainly of chromium and cobalt and has an easy axis of magnetization perpendicular to the surface of the magnetic recording layer, with the thickness of the latter being no greater than 3.0 microns. The low coercive force material layer has a coercive force no greater than 1/5 of the coercive force of the magnetic recording layer, and the thickness of the low coercive force layer is greater than 0.1 microns.

MAGNETIC SENSOR, IN PARTICULAR READ HEAD FOR MAGNETIC RECORDING MEDIUM.

PROCEDURE FOR THE PRODUCTION OF A MEHRKOEPFIGEN MAGNET TRANSDUCER.

DUENNFILM SOLENOID ACTUATOR WITH INTEGRATED MAGNETORESISTIVEN SENSOR.

COMBINED HEAD STRUCTURE FOR DOPPELSPURIGE SENKRECHTE RECORDING.

COMBINED POSTING AND READ SOLENOID ACTUATOR FOR A PERPENDICULARLY MAGNETIZING RECORDING MEDIUM.

TWIN TRACK VERTICAL READ-WRITE HEAD STRUCTURE

TWIN TRACK VERTICAL READ-WRITE HEAD STRUCTURE An improved read-write head for twin track vertical magnetic recording is described. Inductive, solid state, or magneto-resistive sensors may all be employed with the new read-write head structure. A preferred embodiment utilizing a magneto-resistive coupled film sensor for read back which saturates to allow writing is disclosed.

ROTARY HEAD RECORDING SYSTEM

An improved rotary read/write head assembly is particularly suitable for use with a vertical format magnetic recording medium such as tape in a magnetic recording system. A rotary element of the assembly carries a plurality of main poles whose tips are at an edge of the rotary element and kept in substantially contacting relationship with the medium. Rotation of the element causes the pole tips to successively sweep across the medium and sequentially function as the main pole of a probe head.

TWIN TRACK VERTICAL MAGNETIC RECORDING SERVO CONTROL METHOD AND APPARATUS

TWIN TRACK VERTICAL MAGNETIC RECORDING SERVO CONTROL METHOD AND APPARATUS The invention discloses a twin track servoing method and apparatus useful for vertical magnetic media recordings. Vertical magnetic media are those in which the magnetic vector in the medium is oriented perpendicular to the surface of the medium instead of lying laterally or longitudinally in the surface of the medium. There are two servo tracks of essentially constant and opposite magnetic polarity recorded on the vertical magnetic medium for each data channel on the medium. The servo tracks themselves may be segmented into reference zones and control or guard zones and they may be recorded on a dedicated surface of a magnetic medium or on the same surface as the data and interleaved with data tracks. When the servo tracks are alternated with data tracks on the same surface of the medium, a single read/write head for twin track recordings may be used to simultaneously read servo signals and data signals. When the ...

DIFFERENTIAL MAGNETORESISTIVE SENSOR FOR VERTICAL RECORDING

DIFFERENTIAL MAGNETORESISTIVE SENSOR FOR VERTICAL RECORDING of The Disclosure An MR sensor is disclsoed in which a pair of thin film magnetoresistive strips are connected electrically in parallel between two terminals. Strips are spaced apart a distance which is small relative to the density of the stored data to be sensed. The strips are mutually-biased in opposite directions to corresponding points in the linear region of their respective curves by current from a constant source attached to one terminal. Since the resistance of each strip is equal, the current divides equally between the strips. The sensor is positioned adjacent the magnetic surface containing stored data. Vertical components of the magnetic field (preferably vertically recorded data) influence the resistance of the strips differentially. When the sensor encounters a vertical flux transition, the output voltage varies to produce a unimodal type pulse.

INTEGRATED MAGNETIC READ/WRITE HEAD/FLEXURE/CONDUCTOR STRUCTURE

An integrated head/flexure/conductor structure for the reading and writing of information with respect to a relatively moving medium, such as a disk or drum, and a method for manufacturing the same. The proposed structure takes the from of a micro-dimension, elongate, dielectric flexure body, and embedded within such body both magnetic read/write pole structure (transducer componentry), and electrical coil and conductor structure operatively associated with the pole structure. The flexure body and the embedded constituents are formed on an atom-by-atom basis utilizing one or more conventional material-deposition processes.

INFORMATION RECORDING MEDIUM AND METHOD OF FABRICATING THE SAME

An information recording medium includes an optical recording portion. The information recording medium also includes a magnetic recording layer which is provided on a back surface of the optical recording portion. The magnetic recording layer includes a magnetic layer, a concealing layer, a print layer, and a print protective layer. The concealing layer includes a metal film.

Löschkopf in Stahltonmaschinen.

Verfahren zur Magnetkopfherstellung

Multi-layer magnetic recording media and magnetoresistive driven systems

Method and apparatus for controlled front shield thickness for perpendicular writer

The side wall has a tapered side shields the data write device

For embedded perpendicular magnetic recording (PMR) write device of double-patterning mask

MAGNETIC INFORMATION SUPPORT HAS PERPENDICULAR RECORDING

MAGNETIC HEAD FOR PERPENDICULAR RECORDING FOR USE

Transducer of magnetic recording and reproduction

PROCEDE DE REALISATION D'UNE TETE MAGNETIQUE HORIZONTALE ENTERREE ET TETE MAGNETIQUE OBTENUE PAR CE PROCEDE

PROCEDE DE REALISATION D'UNE TETE MAGNETIQUE ENTERREE ET TETE MAGNETIQUE OBTENUE PAR CE PROCEDE. LA TRANCHEE DANS LAQUELLE ON DEPOSE LES DIFFERENTES COUCHES EST OBTENUE EN CREUSANT UN CAISSON 12 DANS UN SUBSTRAT 10 ET EN DEPOSANT UNE COUCHE MAGNETIQUE 14 DANS CE CAISSON. DE CETTE MANIERE, LE BOBINAGE CONDUCTEUR 18 EST ENTERRE. SEULES AFFLEURENT LES COUCHES DEFINISSANT L'ENTREFER OU LA PIECE POLAIRE PRINCIPALE (SELON LE TYPE DE TETE). APPLICATION AUX MEMOIRES D'ORDINATEUR ET AUX MATERIELS AUDIO ET VIDEO.

DEVICE Of WRITING Of INFORMATION ON a MAGNETIC MEDIUM

HIGHLY JUST MAGNETIC TRANSDUCER Of WRITING Of INFORMATION ON a MAGNETIC MEDIUM

MAGNETIC HEAD OF TRANSDUCER IN PARTICULAR FOR the RECORDING IN PERPENDICULAR MODE

Process and device of tape recording of electric impulses and enparticulier of sounds

SUPPORT D'ENREGISTREMENT MAGNETIQUE

A.SUPPORT D'ENREGISTREMENT MAGNETIQUE. B.SUPPORT CARACTERISE EN CE QU'IL SE COMPOSE D'UNE PREMIERE COUCHE FORMANT UNE SURFACE DE SUPPORT DESTINEE A ETRE TOURNEE VERS LA TETE D'ENREGISTREMENT ET QUI EST FORMEE D'UN ALLIAGE CHROME-COBALT CONTENANT ENTRE ENVIRON 5 ET 25 EN POIDS DE CHROME, AVEC UN AXE D'AIMANTATION FACILE ESSENTIELLEMENT PERPENDICULAIRE A LA SURFACE, L'EPAISSEUR DE CETTE PREMIERE COUCHE NE DEPASSANT PAS 3,0MICRONS, AINSI QUE D'UNE SECONDE COUCHE FORMEE D'UNE MATIERE A FAIBLE FORCE COERCITIVE PLACEE SUR LE COTE DE LA PREMIERE COUCHE QUI N'EST PAS TOURNEE VERS LA TETE D'ENREGISTREMENT, ET QUI A UNE FORCE COERCITIVE QUI NE DEPASSE PAS 15 DE LA FORCE COERCITIVE DE LA PREMIERE COUCHE, L'EPAISSEUR DE LA SECONDE COUCHE ETANT AU MOINS EGALES A 0,1MICRON.

TRANSDUCTEUR MAGNETIQUE D'ECRITURE/LECTURE POUR ENREGISTREMENT PERPENDICULAIRE

TRANSDUCTEUR MAGNETIQUE POUR L'ECRITURE ET LA LECTURE D'INFORMATIONS SUR UN SUPPORT D'ENREGISTREMENT PERPENDICULAIRE COMPRENANT UN POLE D'ECRITURE MPOLI PERPENDICULAIRE AU SUPPORT D'ENREGISTREMENT ET UN BOBINAGE BOBI COUPLE MAGNETIQUEMENT A UN POLE D'ECRITURE DONT CHAQUE SECTION DE TOUR EST PERPENDICULAIRE AU SUPPORT. SELON L'INVENTION, LE TRANSDUCTEUR EST CARACTERISE EN CE QUE LE BOBINAGE EST CONSTITUE D'UNE SPIRALE A DEVELOPPEMENT PLAN PARALLELEMENT AU SUPPORT, DISPOSEE AUTOUR DE ET AU VOISINAGE DE L'EXTREMITE DU POLE D'ECRITURE MPOLI DISPOSEE EN REGARD DU SUPPORT. APPLICABLE A L'ENREGISTREMENT PERPENDICULAIRE SUR DISQUE MAGNETIQUE.

MAGNETIC HEAD AND A METHOD OF MANUFACTURING THE SAME FOR PREVENTING REAR LENGTH OF SOFT MAGNETIC FILMS BY RECEDING AN END OF AN AIR BEARING SURFACE OF THE SOFT MAGNETIC FILMS FROM THE AIR BEARING SURFACE

PURPOSE: A magnetic head and a method of manufacturing the same are provided to displace a flare point position of a main electrode by a wafer process or a machining process as an end of an air bearing surface of soft magnetic films recedes from the air bearing surface for preventing the rear length of the soft magnetic films from being changed, thereby obtaining the magnetic head having high process margin. CONSTITUTION: A magnetic head comprises a write element(200). The write element includes a main pole(11), a lower soft magnetic film, an upper soft magnetic film, a coil, first soft magnetic films, and second soft magnetic films(12). The main pole has a first portion extending to an air bearing surface(98) to define a track width and a second portion whose width gradually increases as receding from the air bearing surface. The lower soft magnetic film is magnetically connected to the main pole and has a leading end receding from the air bearing surface. The upper soft magnetic film ...

RECOVERY TIME REDUCING DEVICE FOR A PERPENDICULAR RECORDING SYSTEM, PARTICULARLY FOR REDUCING THE DEVIATION OF A BASE LINE

PURPOSE: A recovery time reducing device for a perpendicular recording system is provided to offer the reduced recovery time and read user's data by a read/write head operated at the read mode and the write mode, thereby reducing the deviation of a base line. CONSTITUTION: A write-to-read transition occurs as indicated by box(50), so that servo and user data are to be read and the recovered signals are to be filtered by a pre-amplifier. Servo data is read first, as indicated by box(52), with the pre-amplifier filtering the data with a passband having a relatively high low frequency corner. The relatively high low frequency corner of the pre-amplifier while servo data is being read is possible because the servo data does not have meaningful low frequency content. Servo data is read with the relatively high low frequency corner until a triggering event occurs, as indicated by decision box(54). Once the triggering even occurs, the pre-amplifier transitions to a relatively low frequency corner ...

Information recording medium and method of fabricating the same

HARD DISK DRIVE HAVING RING HEAD SLIDING ON PERPENDICULAR MEDIA

An information storage system having a ring head (220) sliding on a rigid magnetic storage disk in such close proximity that the magnetic field felt by the media layer or layers of the disk has a larger perpendicular than longitudinal component so that data is stored in a perpendicular mode. The head to media separation during writing of data to the media is a small fraction of the amagnetic gap (160) separating the poletips (155, 157) of the head. Reading of data may be inductive or may be via a magnetoresistive sensor (222) which is coupled to the magnetically permeable core of the ring head far from the poletips. The media preferably has a high perpendicular anisotropy.

Thin film magnetic head, thin film magnetic head device, and magnetic recording/reproducing apparatus

A thin-film magnetic head includes a slider substrate and a write element. The slider substrate has an air bearing surface at one side thereof. The write element has a recording magnetic pole film. The recording magnetic pole film is disposed on a plane crossing the air bearing surface over the slider substrate and has a large-width portion and a small-width portion continuously arranged in the named order toward the air bearing surface. The small-width portion has a smaller width than the large-width portion. Of the large-width portion and the small-width portion, at least the small-width portion has a first portion and a second portion. The second portion is continuous with an upper end of the first portion and has both side faces inclined in such a direction as to increase the width. An external angle of the first portion formed by a plane parallel to a bottom face and the side face is larger than an external angle of the second portion formed by a plane parallel to the bottom face and ...

Magnetic sensor using inverse spin hall effect

A magnetic sensor that generates a signal based on inverse spin Hall effect. The sensor includes a magnetic free layer and a non-magnetic, electrically conductive spin Hall layer located adjacent to the magnetic free layer. Circuitry is configured to supply an electrical current that travels through the magnetic free layer and the spin Hall layer in a direction that is generally perpendicular to the plane of the layers or perpendicular to a plane defined by an interface between the magnetic free layer and the spin Hall layer. The inverse spin Hall effect causes an electrical voltage in the spin Hall layer as a result of the current, and the voltage changes relative to the orientation of magnetization of the magnetic free layer. Circuitry is provided for measuring the voltage in the spin Hall layer in a direction that is generally perpendicular to the direction of the electrical current.

ENHANCED PINNING PROPERTY BY INSERTED SI SEED LAYER

The embodiments of the present invention generally relate to a magnetic head having a silicon seed layer disposed between a lower shield and a metallic underlayer to enhance the unidirectional anisotropy in an antiferromagnetic layer disposed over the metallic underlayer.

Magnetic recording apparatus and magnetic head

Formation of magnetic domains in a perpendicularly magnetized medium comprising an underlayer of a soft magnetic layer is prevented by appropriate magnetic domain control in the soft magnetic layer. One method controls magnetic domains of the soft magnetic layer by applying an external magnetic field to the medium. Another method provides a mechanism in the magnetic head for generating a magnetic field to control the magnetic domains of the soft magnetic layer of the medium.

Magnetic head for perpendicular magnetic recording having two side shields

A main pole has an end face located in a medium facing surface, and first through sixth side surfaces. The first and third side surfaces are connected to the end face of the main pole. The second and fourth side surfaces are located farther from the medium facing surface than are the first and third side surfaces. The fifth side surface connects the first side surface to the second side surface. The sixth side surface connects the third side surface to the fourth side surface. The distance between the first side surface and the third side surface decreases with increasing proximity to the top surface of the substrate. The shape of the first side surface is defined by a first side shield. The shape of the third side surface is defined by a second side shield.

Method to form tapered magnetic shield for perpendicular recording head

The inadvertent introduction of stray fields at the media surface by the shields that form part of a magnetic read-write head has been eliminated by using a combination of masking and ion milling to remove small amounts of material close to the shields' outer edges. As a consequence, instead of presenting a sharp edge to the ABS, a shield's lower surface slopes gently away from it.

Single pole type recording head with tapered edges

A magnetic head for perpendicular recording without writing from the lateral sides of a main pole and without erasing data on adjacent tracks. A magnetic disk storage apparatus using the magnetic head. The lateral side of the main pole of a magnetic head for perpendicular recording may have an inverted tapered shape obtained by forming a groove as a track portion to an inorganic insulating layer and then forming a magnetic layer and then flattening the upper surface. A leading edge, a trailing edge, or both lateral edges of the magnetic head may be tapered. The taper may be either smooth and linear or curved in profile.

Stabilizer for magnetoresistive head in current perpendicular to plane mode and method of manufacture

A reader of a magnetoresistive head includes a spin valve with sensor having a stabilizing hard bias and side shield at the side of the sensor, to substantially reduce the undesired flux from adjacent bits and tracks. At least one free layer is spaced apart from at least one pinned layer by a spacer. Above the free layer, a capping layer is provided. The stabilizer may include an insulator, a soft material that is a shielding layer, a decoupling layer, and a hard bias. As a result, the free layer is shielded from the undesired flux of adjacent tracks, and recording media having substantially smaller track size and bit size can be used.

Magnetic recording and reproducing apparatus

A magnetic recording and reproducing apparatus includes a magnetic head having a main magnetic pole, a magnetic recording medium of a discrete type having a predetermined convex-concave structure at data tracks and servo tracks, and a drive device body that can operate to rotationally drive the magnetic recording medium in a constant direction and cause the magnetic head to be movable in substantially radial directions of the magnetic recording medium. A relationship among parameters specifying a predetermined convex-concave shape of the data track, parameters specifying the main magnetic pole, and a skew angle is defined by a predetermined inequality. By setting a specification of the magnetic recording and reproducing apparatus in the range defined by the inequality, it is possible to prevent unwanted writing into the adjacent track to thereby realize high-density recording having extremely high reliability.

Method of manufacturing perpendicular magnetic recording head capable of highly precisely defining gap distance

A method of manufacturing a perpendicular magnetic recording head is provided. The method accurately defines a gap layer. The method includes forming a lower gap layer made of a non-magnetic material on a main magnetic pole layer. An upper gap layer is formed on the lower gap layer, the upper gap layer being made of the non-magnetic material. A resist layer is formed on the upper gap layer, and the resist layer is removed from an end surface. The upper gap layer not covered with the resist layer is removed, while exposing a new film surface by removing a surface oxidation layer of the resist layer. A return path layer is formed by plating on the exposed lower gap layer, the upper gap layer, and the resist layer through the plating underlayer.

Method and apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording

A method and apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording. A reverse air bearing surface head for perpendicular recording is provided with an inversed bevel shape to handle skew when recording data on a magnetic recording medium.

Thermomagnetic recording device

A thermomagnetic recording device for recording information on a magnetic recording medium having magnetic anisotropy across the thickness thereof comprises a laser beam irradiation mechanism applying a laser beam to said magnetic recording medium to reduce the coercive force thereof, and a single-pole magnetic head including a ferromagnetic thin membrane having an end face located opposite to said magnetic recording medium, a main body supporting said thin membrane, and a coil applying a perpendicular magnetic field to said recording medium through said end face of said thin membrane.

Optical reproducing system

An optical reproducing system for reading out magnetically recorded data comprises an optical head (4,4a,4b,4c,4d) for copying magnetic pattern on a magnetic recording medium like a magnetic tape (1), a conversion system (5,6,7,8,9,10) for converting a magnetic pattern on the optical head (4 et al.) to an optical pattern by using the Faraday effect which rotates a polarization of an LED beam (light emission diode) or a laser beam according to magnetic polarity in a domain in said optical head, a charge coupled device (3, CCD) with a plurality of cells for converting beam energy polarized according to recorded data to correspond to electrical output signal. The CCD device effects the conversion or reading of a plurality of data simultaneously.

Superconductor devices useful for disk drives and the like

Superconducting material improves the operating efficiency and reduces the operating power demand for a disk drive suitable for interchanging data with a magnetic or optic media. The arm containing the head is moved along a path by a balanced superconductor to magnetic field interface such as for radial positioning relative to a circular media and is maintained in constant spatial relation with respect to the media by advantageous application of superconductive layers and magnetic field sources. The superconductor environment also permits efficient bearing support for the media as well as accommodating superconductor motors for driving the media and the use of various circuit elements associated with the drive electronics.

Magnetic sensing apparatus having a central core with wire therethrough

A magnetic headsensing apparatus includes a first, second and third magnetic core of a soft magnetic film formed by a thin film forming method. One end of the first and second magnetic core face a magnetic recording medium and are disposed with a predetermined distance therebetweenfield. The third magnetic core is disposed between the first and second magnetic cores. A conductive coil is wound around the third magnetic core. A conductive wire passes through the third magnetic core and is insulated therefrom. A DC-biased high-frequency constant current flows through the conductive wire to reproduce information recorded on the magnetic recording medium. Also, a recording signal is applied to the conductive coilsense the magnetic field.

Magnetic head for perpendicular magnetic recording having a write shield

A magnetic head includes first and second coils, a main pole, a write shield, a return path section, and a core part. The write shield includes first and second shield portions located on opposite sides of the main pole in a track width direction. The return path section includes first and second yoke portions located on opposite sides of the main pole in the track width direction. The core part is magnetically connected to a part of the main pole located away from a medium facing surface. The first coil surrounds at least part of the entire outer periphery of the main pole. The second coil surrounds at least part of the core part.

DIFFERENTIAL GMR HEAD SYSTEM AND METHOD USING SELF-PINNED LAYER

A magnetoresistive read (MR) sensor system and a method for fabricating the same are provided. First provided are a first ferromagnetic layer, a first spacer layer positioned above the first ferromagnetic layer, and a second ferromagnetic layer positioned above the first spacer layer for working in conjunction with the first ferromagnetic layer to define a first sensor. An antiparallel coupling layer is positioned above the second ferromagnetic layer to separate the first sensor from a second sensor. The second sensor is defined by a third ferromagnetic layer positioned above the antiparallel coupling layer, a second spacer layer positioned above the third ferromagnetic layer, and a fourth ferromagnetic layer positioned above the second spacer layer.

Method for fabricating thin-film magnetic heads

A method for fabricating thin-film magnetic heads on a generally planar substrate. Each of the magnetic heads has a coil, a pole magnetically coupled with the coil, and a contact pad arranged on the bottom of the body of the magnetic head. The contact pad surrounds the free end of the pole and extends flush therewith, so that the free end of the pole and the contact pad are brought into a sliding engagement with the magnetic disk, to mitigate the wear of the pole. At the first step in the fabrication of the magnetic heads, a plurality of recesses are formed in the surface of the substrate in accordance with the arrangement of the magnetic heads to be fabricated, and the recesses are filled with a material for forming contact pads. Then the coil and the pole of each of the magnetic heads are formed on the substrate by the use of a known thin-film forming technique so that a portion of the pole is placed on the material for forming the contact pad. The substrate is then separated into a plurality ...

Recording and reproducing apparatus

A disk-shaped recording medium includes a transparent substrate, and an optical recording layer formed on the transparent substrate. A light source emits light. An optical head is operative for applying the light to the optical recording layer from the light source via the transparent substrate, for focusing the light on the optical recording layer, and for reproducing information from the optical recording layer. A position detecting device is operative for detecting at least one of a pit depth and a physical position of information which has a first given relation with a specified address and which is recorded on the recording medium, and for generating first positional information representing at least one of the pit depth and the physical position. A previously-recorded secret code is reproduced from the recording medium. The secret code represents second positional information. The secret code is decoded into the second positional information. The second positional information represents ...

Encoding techniques for patterned magnetic media

Perpendicular recording magnetic head

Embodiments of the present invention provide a perpendicular recording magnetic head having a narrow track width, high recording magnetic field intensity, and a good recording magnetic field distribution. According to one embodiment, a perpendicular recording magnetic head includes a read section and a write section. The write section includes a main magnetic pole layer, a lower sub magnetic pole layer, an upper sub magnetic pole layer, a pedestal magnetic layer, and a coil conductor generating a magnetic flux in the main magnetic pole layer. The write section further includes lower and upper auxiliary magnetic pole layers disposed on a leading side and a trailing side, respectively, relative to a medium moving direction, adjacent to the main magnetic pole layer. The lower and upper auxiliary magnetic pole layers are retracted from an air bearing surface. The upper auxiliary magnetic pole layer is retracted from the air bearing surface less than the lower auxiliary magnetic pole layer.

Three dimensional magnetic memory and/or recording device

An electronic memory and/or recording device includes a three dimensional magnetic medium. Three dimensional magnetic medium includes a plurality of magnetic sublayers, each of the magnetic sublayers being separated from one other by non-magnetic interlayers.

Magnetic recording transducers having slim shaped additional poles

A magnetic transducer has an air-bearing surface (ABS). The magnetic transducer has a main pole, at least one coil for energizing the main pole and at least one additional pole. The main pole has a yoke and a pole tip having an ABS facing surface. The at least one additional pole is adjacent to the main pole in a down track direction. The additional pole is recessed from the ABS, has a front surface facing the ABS, has at least one side surface, and has at least one flare angle between the front surface and the at least one side surface. The at least one flare angle is measured from the ABS to the at least one side surface and is at least fifty degrees and less than ninety degrees.

Manufacturing method of thin-film magnetic head, wafer for thin-film magnetic head and thin-film magnetic head

A manufacturing method of a thin-film magnetic head, includes a step of forming many thin-film magnetic heads arranged along row and column directions on a wafer, each of the thin-film magnetic heads having a read head element, a write head element, and pairs of probe-use pads electrically connected with the read head element and the write head element, respectively, the pairs of probe-use pads being positioned so that at least part of each probe-use pad is removed by a cutting process along the row direction, a step of obtaining a plurality of row-bars by cutting the wafer along the row direction so that the at least part of each probe-use pad is removed, each of the obtained row-bars having the thin-film magnetic heads aligned in the row direction, a step of forming pairs of bonding pads electrically connected with the read head element and the write head element, respectively, on a surface opposite to an ABS of each thin-film magnetic head of each of the row-bars, and a step of cutting ...

Magnetic head for perpendicular magnetic recording and method of manufacturing same

A magnetic head includes a pole layer and a shield. The shield includes a shield layer having a front end face located in the medium facing surface at a position forward of an end face of the pole layer along a direction of travel of the recording medium. The magnetic head further includes a stopper layer for suppressing protrusion of the front end face of the shield layer, the stopper layer being disposed adjacent to the shield layer and made of a nonmagnetic material having a linear thermal expansion coefficient of 5x10-6/° C. or smaller at a temperature of 25° C. to 100° C.

Magnetic head and magnetic disk device

According to one embodiment, a magnetic head is arranged opposite a magnetic recording medium including a recording layer. The magnetic head includes a magnetic pole, a light emitting unit, and a distance adjusting unit. The magnetic pole includes a soft magnetic material. The light emitting unit is arranged with respect to the magnetic pole in a travel direction of the magnetic head, and emits light with respect to the recording layer. The distance adjusting unit adjusts a distance between the magnetic pole and the light emitting unit.

Perpendicular magnetic recording write head with slanted magnetic write pole

A perpendicular magnetic recording write head is formed on the trailing surface of a head carrier or slider that has an air-bearing surface (ABS) oriented generally parallel to the surface of the disk during operation of the disk drive. The write head has a slanted ferromagnetic write pole (WP) that forms an angle between about 5 and 20 degrees from a normal to the ABS. The slanted WP is formed over the generally planar surface of the ferromagnetic main pole and the slanted surface of a support layer located between the ABS and the recessed end of the main pole. A trailing shield (TS) has a slanted face that is generally parallel to and spaced from the slanted WP, with a nonmagnetic gap layer located between the slanted face of the TS and the slanted WP.

Perpendicular magnetic head with yoke overlapping inner side portion and increasing in width and thickness along height

A perpendicular magnetic recording head includes a first magnetic portion, a second magnetic portion formed with a gap from the first magnetic portion, and a coil layer located in the gap between the first magnetic portion and the second magnetic portion for applying a recording magnetic field to the first magnetic field and the second magnetic field. The yoke layer is formed on the second magnetic portion, a width whose direction is orthogonal to the height direction of a front end of the yoke layer becomes larger gradually or continuously as going in the height direction, and the width becomes larger gradually or continuously as going farther from the second magnetic portion.

Magnetic head for perpendicular magnetic recording that includes a sensor for detecting contact with a recording medium

A magnetic head for perpendicular magnetic recording includes a read head unit, a write head unit disposed forward of the read head unit along the direction of travel of a recording medium, a heater that generates heat for causing the medium facing surface to protrude in part, an expansion layer that makes part of the medium facing surface protrude, and a sensor that detects contact of the part of the medium facing surface with the recording medium. The write head unit includes a main pole, a write shield, and a return path section. The return path section includes a yoke layer located backward of the main pole along the direction of travel of the recording medium, a first coupling part that couples the yoke layer and the write shield to each other, and a second coupling part that is located away from the medium facing surface and couples the yoke layer and the main pole to each other.

Method of fabricating a thin film magnetic recording head

A method of fabricating a thin film magnetic recording head including a perpendicular recording head having an auxiliary pole, a main pole and a shield against an external magnetic field. The shield against the external magnetic field is formed so that an edge of the shield against the external magnetic field is disposed at a position recessed at least from an edge of the main pole relative to a surface against a medium.

Heat assisted magnetic recording head and method

A magnetic recording head comprises a write pole having a pole tip adjacent to an air bearing surface, a return pole, a near field transducer positioned adjacent to the air bearing surface for producing near field radiation for heating a portion of a magnetic storage medium, wherein a thermal profile of the portion of the magnetic storage medium has a maximum gradient at a location subject to a magnetic write field produced by the write pole. A disc drive that includes the magnetic recording head and a method of recording using the magnetic recording head are also provided.

Microwave assisted magnetic recording head with spin torque oscillator corner angle relationship, head gimbal assembly, and magnetic recording device

A microwave assisted magnetic head includes a main magnetic pole; a trailing shield; and a spin torque oscillator provided between the main magnetic pole and the trailing shield. The spin torque oscillator has a first end surface configuring a part of an air bearing surface, a second end surface facing the main magnetic pole, and a third end surface facing the first end surface, the first angle θ1 made by the first end surface and the second end surface is smaller than the second angle θ2 formed by the second end surface and the third end surface, and the second angle θ2 is 80 to 100 degrees.

APPARATUS OF MAGNETIC DISC

An object of the present invention is to further improve a recording density in a magnetic disk apparatus using a shingle write system. In a magnetic disk apparatus including a magnetic disk, a recording head that writes information on the magnetic disk, and a controller that controls a writing operation of the recording head to the magnetic disk, the controller controls the writing operation such that the recording head writes information on a region including a target track and a portion of track adjacent thereto in an overlapping manner while position-shifting in a radial direction of the magnetic disk and a first writing frequency to a track on which information is last written is higher than a second writing frequency to another track.

Magnetic head and magnetic recording and reproducing device

According to one embodiment, a magnetic head includes a magnetic pole, a first shield, and a stacked body. The stacked body is provided between the magnetic pole and the first shield. The stacked body includes a magnetic layer including at least one selected from the group consisting of Fe, Co, and Ni, a first conductive layer provided between the magnetic pole and the magnetic layer, the first conductive layer being nonmagnetic, and a second conductive layer provided between the magnetic layer and the first shield, the second conductive layer being nonmagnetic. The first conductive layer includes Ir. A thickness of the first conductive layer along a first direction is not less than 0.3 nm and not more than 0.8 nm. The first direction is from the first conductive layer toward the second conductive layer.

Method for fabricating a magnetic write pole using vacuum deposition

A method and system provide a magnetic transducer having an air-bearing surface (ABS) and an intermediate layer. A trench having a shape and location corresponding to a main pole is formed in the intermediate layer. The main pole is provided. At least a portion of the main pole is in the trench. Providing the main pole further includes vacuum depositing a first main pole material layer. The first main pole material layer is thin enough to preclude filling of the trench. The first main pole material layer is then ion beam etched. A second main pole layer is vacuum deposited on the first main pole layer. The second main pole material layer is also thin enough to preclude filling of the trench. An additional main pole layer is also deposited.

PLURAL TRACK FLUX GATE TRANSDUCER HEAD WITH COMMON EXCITATION MEANS

Method for forming a magnetic head having a flux shaping layer

A method for fabricating a magnetic head includes forming a first pole and a flux shaping layer in spaced relation to the first pole. A nonmagnetic layer is formed adjacent the flux shaping layer and positioned on an air bearing surface (ABS) side of the flux shaping layer. A tapered recess is created in the nonmagnetic layer, the taper of the recess increasing (i.e., becoming deeper) towards the flux forming layer. The recess is filled with a magnetic material. A probe layer is formed such that it is in electrical communication with the magnetic material filling the recess.

Perpendicular magnetic recording head with dynamic flying height heating element disposed below turns of a write coil

A magnetic head for perpendicular magnetic recording includes a slider having an air bearing surface (ABS) and a trailing surface and a transducer fabricated on the trailing surface. The transducer includes a magnetoresistive (MR) read element disposed within a gap material bounded by shield material, an adjunct pole, and a main pole formed in an adjacent layered relationship to the adjunct pole. The adjunct pole has a front edge that is recessed from the ABS and a rear edge. The main pole has a write tip that extends approximately to the ABS. The transducer further includes a write coil having a first layer of turns below the adjunct pole and above the shield material. The magnetic head also includes a heating element with a portion of the heating element below the write coil and behind the rear edge of the adjunct pole.

Perpendicular magnetic recording head having a main pole and first and second magnetic films peripheral to the main pole and having different depths from an air bearing surface

A perpendicular magnetic recording head according to one embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the depths of the first magnetic films from an air bearing surface are smaller than the depth of the second magnetic film from the air bearing surface at least at a periphery of the main pole. A perpendicular magnetic recording head according to another embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the main pole and the first magnetic films have respective tapered portions whose thicknesses become larger toward the side opposite to an air bearing surface, and the tapered portions are in contact ...

Dual write heater for slider surface topography control in double perpendicular magnetic recording (PMR) writers

A dual perpendicular magnetic recording writer is disclosed wherein first and second dynamic fly height (DFH) heaters WDFH1 and WDFH2, are formed in first and second writers, respectively, on a slider in a head gimbal assembly. In one embodiment, WDFH1 and WDFH2 have front sides that are recessed behind first and second back gap connections (BGC), respectively, and join together at their respective backsides behind the interconnect which connects a bucking coil and driving coil each symmetrically disposed about a center plane separating the two writers. In another embodiment with a separate bucking coil in each writer, WDFH1 and WDFH2 are formed behind separate interconnects. Magnetic spacing loss is reduced compared with a single DFH heater spread across both writers. Close point at touchdown in a cross-track direction and the size of the touchdown area are controlled by applying a WDFH1:WDFH2 power ratio from 100:0 to 0:100.

MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING WITH A COIL INCLUDING A FIRST WINDING PORTION OF ONE TURN AND A SECOND WINDING PORTION OF LESS THAN ONE TURN

A magnetic head includes a coil, a main pole and a return path section. The return path section is located on the trailing side relative to the main pole so that a space is defined between the main pole and itself. The coil includes a first winding portion and a second winding portion connected in series. The first winding portion extends to pass through the aforementioned space, and extends once around the entire perimeter of the main pole as viewed from the medium facing surface. The second winding portion does not pass through the aforementioned space, and surrounds only a part of the entire perimeter of the main pole as viewed from the medium facing surface.

System for providing a perpendicular magnetic recording transducer using a split seed layer

A magnetic recording transducer comprises a main pole having a bottom, a top wider than the bottom, and a top bevel. The transducer further comprises a nonmagnetic gap covering the main pole, a portion of the nonmagnetic gap residing on the top of the main pole, a first seed layer, at least a portion of the first seed layer covering the portion of the nonmagnetic gap on top of the main pole, a second seed layer residing on the first seed layer, and a wrap-around shield on the second seed layer.

MAGNETIC DISK DEVICE

According to one embodiment, a magnetic disk device includes a rotatable disk-shaped recording medium, a magnetic head including a write head having a main magnetic pole that applies a recording magnetic field to the recording medium, an assist element that assists magnetic recording by the main magnetic pole, and a plurality of thermal actuators that control a head gradient with respect to the recording medium, and a controller which includes a detection unit configured to detect deterioration of the magnetic head, and changes a head gradient of the magnetic head by the thermal actuator according to the detected deterioration.

Double notched shield and pole structure for stray field reduction in a magnetic head

A double notched magnetic structure for use in a magnetic head for avoiding stray field writing. The structure could be a magnetic shield, magnetic pole of a write head or some other magnetic structure used in a magnetic head of a magnetic recording system, and has notches formed at both the front end (adjacent to the ABS) and at the back end (away from the ABS). The notches at the front end form a forward protruding portions that performs the necessary function of the structure, such as magnetic shielding, and has laterally extending recessed portions (recessed by the front notches) that move the flux focal points of the structure away from the ABS to avoid stray field writing. The back notches form a backward extending portion that affects the geometry of the structure to prevent the focusing of magnetic flux caused by stray magnetic fields having a component perpendicular to the ABS.

Recording device with microtip covered by magnetoresistive multilayer

Magneto-optical recording apparatus

Tranducing head writer having write pole bridge feature, and devices thereof

A transducing head writer comprising a write pole having write pole tip, a yoke disposed on the write pole at a location that is recessed from the write pole tip, and a bridge feature disposed on the write pole between the yoke and the write pole tip, where the bridge feature has a geometry that is larger at a recessed end adjacent to the yoke compared to a proximate end adjacent to the write pole tip.

Magnetic head, magnetic head assembly, and magnetic recording/reproducing apparatus

According to one embodiment, a magnetic head includes a reproducing section. The reproducing section has a medium facing surface facing a magnetic recording medium and detects a direction of magnetization recorded in the medium. The reproducing section includes a first magnetic pinned layer, a second magnetic pinned layer, and a magnetic free layer. Directions of magnetizations of the first and second magnetic pinned layers are pinned. The second magnetic pinned layer is stacked with the first magnetic pinned layer in a first direction parallel to the medium facing surface. The magnetic free layer is provided between the first and second magnetic pinned layers. A direction of magnetization of the magnetic free layer is changeable. A length of the magnetic free layer along a second direction perpendicular to the medium facing surface is shorter than lengths of the first and second magnetic pinned layers along the second direction.

Wet etching silicon oxide during the formation of a damascene pole and adjacent structure

A magnetic head according to one embodiment includes a side gap layer comprising primarily silicon nitride, wherein outer sides of the side gap layer taper away from one another from a leading end of the side gap layer towards a trailing end of the side gap layer; a seed layer above the silicon nitride side gap layer; and a magnetic pole on the seed layer. A method for forming a magnetic head according to one embodiment includes etching a channel in a silicon oxide layer; forming a side gap layer comprising primarily silicon nitride in the channel; forming a seed layer above the side gap layer; plating a pole on the seed layer; and removing the silicon oxide layer by wet etching. Additional systems and methods are also presented.

Process to make pmr writer with leading edge shield (les) and leading edge taper (let)

Methods for fabrication of leading edge shields and tapered magnetic poles with a tapered leading edge are provided. The leading edge shield may be formed by utilizing a CMP stop layer. The CMP stop layer may aid in preventing over polishing of the magnetic material. For the tapered magnetic poles with a tapered leading edge, a magnetic material is deposited on a planarized surface, a patterned resist material is formed, and exposed magnetic material is etched to form at least one tapered surface of the magnetic material.

Magnetic head for perpendicular magnetic recording with shield around main pole

A magnetic head includes a shield, and first and second return path sections. The shield has an end face that is located in a medium facing surface to wrap around an end face of a main pole. The shield includes a bottom shield, two side shields, and a top shield. The first return path section includes a yoke layer, and first and second coupling layers that magnetically couple the bottom shield and the yoke layer to each other. The first coupling layer is magnetically connected to the bottom shield. The second coupling layer magnetically couples the first coupling layer to the yoke layer. No end faces of the second coupling layer are exposed in the medium facing surface. The second return path section magnetically couples the top shield and the main pole to each other.

Method for manufacturing a perpendicular magnetic write pole having a write pole and trailing shield with a tapered trailing gap

A method for manufacturing a magnetic write head having a that has a write pole with a tapered trailing edge in a pole tip region, and a trailing shield that has a leading edge that tapers away from the write pole at an angle that is greater than that taper angle of the trailing edge of the write pole. The magnetic head has a step feature with a front edge that is recessed from the ABS. In one embodiment a magnetic wedge is formed over the tapered surface of the write pole. In another embodiment, a non-magnetic bump is formed over a first tapered portion of the write pole adjacent to the front edge of the step feature, and a non-magnetic wedge is formed over a second tapered portion of the write pole and extends from the non-magnetic bump to the air bearing surface.

Nicr as a seed stack for film growth of a gap layer separating a magnetic main pole or shield

A method and apparatus for a high-moment magnetic material used in a write head deposited on a gap layer that was grown using a nickel-chromium seed layer. The nickel-chromium seed layer provides the correct crystallographic orientation for both the nonmagnetic gap layer and the high-moment magnetic material such that the high-moment magnetic material has soft-magnetic properties and is useful as either a main pole or as shield layer in a write head. Moreover, the nickel-chronium seed layer, which may be exposed on the air bearing surface (ABS) of the write head, has an etch rate similar to other metals found in the ABS, thereby avoiding pole tip protrusion during later processing.

Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, and a thin-film coil are laminated on a substrate. The thin-film coil has a coil-layer. The coil-layer has a turn part arranged closer to an ABS than is a rear end part of the main magnetic pole layer farthest from the ABS. Regarding a substrate side coil-layer, arranged between the main magnetic pole layer and the substrate, of the coil-layer, a thickness of a non-corresponding magnetic pole part other than a magnetic pole corresponding part corresponding to an arrangement space of the main magnetic pole layer is larger than a thickness of the magnetic pole corresponding part.

Magnetic head for perpendicular magnetic recording that includes a sensor for detecting contact with a recording medium

A magnetic head includes a main pole, a write shield, a return path section, a heater that generates heat for making part of a medium facing surface protrude, and a sensor that detects contact of the part of the medium facing surface with a recording medium. The return path section includes: a yoke layer located backward of the main pole along the direction of travel of the recording medium; a first coupling part coupling the yoke layer and the write shield to each other; and a second coupling part located away from the medium facing surface and coupling the yoke layer and the main pole to each other. The first coupling part has an end face facing toward the yoke layer. This end face includes a middle portion spaced from the yoke layer and facing the yoke layer, and two side portions located on opposite sides of the middle portion in a track width direction and in contact with the yoke layer. The sensor is located between the middle portion and the yoke layer.

Write pole fabricated using a carbon hard mask and method of making

A magnetic writer comprises a write pole, a substrate and a non-magnetic, oxygen-free buffer material. The write pole has a leading edge, a trailing edge, a first side and second side. The substrate is at the leading edge of the write pole. The non-magnetic, oxygen-free buffer material is located between the write pole and the substrate, and the oxygen-free buffer material is selected from Re, Ru, Os, Rh, Ir, and combinations thereof.

Magnetic head for perpendicular magnetic recording having a main pole and a shield

A magnetic head includes a coil, a main pole, a write shield, and first and second yoke layers. The first and second yoke layers are magnetically connected to the write shield and aligned along the direction of travel of a recording medium such that the main pole is interposed therebetween. The coil includes a winding portion of planar spiral shape that is formed in one or more layers. The magnetic head further includes: a first coupling part located away from the medium facing surface and magnetically coupling the main pole and the second yoke layer to each other; and a second coupling part located away from the medium facing surface and magnetically coupling the first yoke layer and the second yoke layer to each other without touching the main pole. The winding portion is wound around the first coupling part, and a part of the winding portion passes between the first and second coupling parts.

Magnetic head, head gimbal assembly with the same, and disk drive

According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a return pole opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between respective facing surfaces of the main pole and the return pole and configured to produce a high-frequency magnetic field. At least one of the main and return poles faces the high-frequency oscillator and includes a laminated structure portion includes a magnetic layer and a nonmagnetic layer laminated to one another.

Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, and a thin-film coil are laminated on a substrate. The write shield layer has an opposing shield part opposing the main magnetic pole layer and a front shield part. The front shield part is connected to the opposing shield part without straddling the thin-film coil. Besides, the front shield part has a shield front end face disposed in the medium-opposing surface and a shield upper end face formed distanced from the medium-opposing surface. Further, the front shield part has a shield connecting part. The shield front end face is connected to the shield upper end face by the shield connecting part.

Magnetic recording head and magnetic recording apparatus

An example magnetic writing head includes a main magnetic pole, a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field, and a laminated body. The laminated body includes a first magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole and a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole.

Write pole and shield with different taper angles

A first trench sidewall has a continuous first taper angle that terminates at a first plane. At least one layer may be deposited that forms a second trench sidewall with a continuous second taper angle that extends a predetermined depth past the first plane and is less than the first taper angle. A write pole may then be formed on the second trench sidewall with the write pole being closer to the first trench sidewall at the predetermined depth than at the first plane.

Co/Ni multilayers with improved out-of-plane anisotropy for magnetic device applications

A MTJ for a spintronic device is disclosed and includes a thin seed layer that enhances perpendicular magnetic anisotropy (PMA) in an overlying laminated layer with a (Co/Ni) n composition or the like where n is from 2 to 30. The seed layer is preferably NiCr, NiFeCr, Hf, or a composite thereof with a thickness from 10 to 100 Angstroms. Furthermore, a magnetic layer such as CoFeB may be formed between the laminated layer and a tunnel barrier layer to serve as a transitional layer between a (111) laminate and (100) MgO tunnel barrier. There may be a Ta insertion layer between the CoFeB layer and laminated layer to promote (100) crystallization in the CoFeB layer. The laminated layer may be used as a reference layer, dipole layer, or free layer in a MTJ. Annealing between 300° C. and 400° C. may be used to further enhance PMA in the laminated layer.

Writer design with enhanced writability

A perpendicular magnetic recording (PMR) head is fabricated with a main pole and a trailing edge shield having surfaces and interior portions that may include synthetic antiferromagnetic multi-layered superlattices (SAFS) formed on and/or within them respectively. The SAFS, which are multilayers formed as periodic multiples of antiferromagnetically coupled tri-layers, provide a mechanism for enhancing the component of the writing field that is vertical to the magnetic medium by exchange coupling to the magnetization of the pole and shield and constraining the directions of their magnetizations to lie within the film plane of the SAFS.

Writer with an AFM write gap

A perpendicular magnetic recording (PMR) head is fabricated with main pole and a trailing edge shield antiferromagnetically coupled across a write gap by either having the write gap layer formed as a synthetic antiferromagnetic tri-layer (SAF) or formed as a monolithic layer of antiferromagnetic material. The coupling improves the write performance of the writer by enhancing the perpendicular component of the write field and its gradient. Methods of fabricating the writer are provided.

Chamfered Magnetic Write Pole

A write pole can have a magnetically conductive pole tip has at least one corner. The at least one corner may be chamfered to limit magnetic saturation of the conductive pole tip. The conductive pole tip can have one or more beveled surface that has a chamfered corner which extends a predetermined distance along an edge of the write pole.

Method of Forming a PMR Writer Device with Multi-Level Tapered Write Pole

A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole which creates an efficient channeling of magnetic flux to the pole tip. The write pole comprises a main pole with a tapered tip on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the tapered tip, giving the write pole a stepped profile. The tapered tip can be two sloped surfaces that are symmetric about a mid plane of the main pole or a single sloped edge on the leading side or the trailing side of the pole. The yoke structure can consist of a single yoke formed on one side of the main pole or it can consist of two yokes formed symmetrically on both the leading and trailing sides of the main pole.

Magnetic recording head with notched shield

A magnetic recording head includes a magnetic recording write element including a main pole having a leading edge and an opposing trailing edge and a first side surface and a second side surface separating the leading edge from the trailing edge. A first side shield gap separates a first side shield from the first side of the main pole and a second side shield gap separates the second side shield from the second side of the main pole. A front magnetic shield is separated from the main pole trailing edge by a front shield gap. A recess extends into the front shield adjacent to the trailing edge, and parallel to the trailing edge. The recess extends laterally away from the main pole and into the front shield a distance greater than the first side shield gap or second side shield gap.

Energy-assisted magnetic recording head and magnetic recording device

In a case in which a microwave-assisted magnetic recording system is applied to a shingled write system for recording with high density, the width of a high-frequency generation element is narrower than a track width of main pole, and both steep parts of magnetic field gradients 24 and 25 are overlap each other by performing offset of a high-frequency magnetic field generating unit 17 of the magnetic head for shingled write from the central line of the main pole 8 in the both areas having high magnetic field gradient. At that time, a magnetic field vector 11 from the main pole 8 is perpendicular incident on a film surface of the high-frequency magnetic field generating unit by using means such as a method for arranging a shield material having high magnetic permeability so that main pole magnetic field is corrected and induced, a method for arranging a hard bias layer to which a desired static magnetic field is added, and a method for obliquely forming a high-frequency magnetic field generating unit, thereby performing stable oscillation to realize magnetic recording with high density.

Magnetic head for perpendicular magnetic recording having a main pole, a shield and a coil core part setback away from the medium facing surface a specified distance

A magnetic head includes: a main pole; a coil; a first shield having an end face that is located in a medium facing surface at a position forward of an end face of the main pole along a direction of travel of a recording medium; and a first return path section disposed forward of the main pole along the direction of travel of the recording medium. The first return path section connects part of the main pole away from the medium facing surface to the first shield so that a first space is defined. The coil includes a first portion having a planar spiral shape and wound around a core part of the first return path section. The first portion includes first and second coil elements that each extend through the first space. No part of the coil other than the first and second coil elements exists in the first space.

Method for manufacturing a magnetic write pole of a perpendicular magnetic write head using novel mask fabrication

A method for manufacturing a magnetic write pole of a magnetic write head for perpendicular magnetic recording. A magnetic write pole material is deposited, followed by union milling hard mask, a polymer mask under-layer followed by a dielectric hard mask material, followed by a photoresist. The photoresist is patterned to define a write pole shape and the shape of the patterned photoresist is transferred onto the underlying dielectric hard mask by a novel reactive ion etching that is performed in a chemistry that includes one or more fluorine containing gases and He. The presence of He in the reactive ion etching tool helps to improve the profile of the patterned dielectric hard mask. In addition, RIE parameters such a gas ratio (e.g. CF4 to CHF3 gas ratio) and power ratio (e.g. source power to bias power) are adjusted to optimize the profile of the patterned dielectric mask.

Magnetic write head with novel shield structure

A magnetic write head having a gap structure that improves write head performance. The write head includes a magnetic write pole and a magnetic shield that is separated from the trailing edge of the write pole by a non-magnetic trailing gap layer and is separated from the sides of the write pole by non-magnetic side gap layers. The trailing gap extends laterally beyond the side gap layers, and a convex bump is formed an edge of the magnetic shield at a location near the trailing end of the side gap layers.

Magnetic head having high-frequency oscillatory elements and disk drive with the same

According to one embodiment, a magnetic head includes a main pole configured to apply a perpendicular recording magnetic field to a recording layer of a recording medium, a return pole opposed to the trailing side of the main pole with a write gap therebetween and configured to reflux magnetic flux from the main pole to form a magnetic circuit in conjunction with the main pole, a coil configured to excite magnetic flux in the magnetic circuit includes the main pole and the return pole, a plurality of high-frequency oscillatory elements individually interposed between the main pole and the return pole, includes a plurality of magnetic films different in magnetic resonance frequency, and configured to individually apply high-frequency magnetic fields to the recording medium, and an electrical circuit configured to energize the high-frequency oscillatory elements.

Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, a thin-film coil and a shield magnetic layer are laminated on a substrate. The thin-film magnetic head has a shield magnetic layer. This thin-film magnetic head has a hard guard frame layer surrounding an equidistant coil part, disposed at a position equidistant from the substrate, from outside and being in direct contact with almost a whole outside surface defining an outer shape of the equidistant coil part.

Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive

A microwave assisted magnetic recording head includes a recording magnetic pole unit that produces a recording field for writing to a perpendicular magnetic recording medium, and a high-frequency magnetic field oscillator that produces a high-frequency magnetic field. The recording magnetic pole unit includes a magnetic core with a write gap portion at which a main recording field component is concentrated, and the high-frequency magnetic field oscillator is disposed in the write gap.

Hamr nft materials with improved thermal stability

A near field transducer includes gold and at least one dopant. The dopant can include at least one of: Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo. The dopant concentration may be in a range from 0.5% and 30%. The dopant can be a nanoparticle oxide of V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th, or a nitride of Ta, Al, Ti, Si, In, Fe, Zr, Cu, W or B.

MAGNETIC RECORDING MEDIA WITH SOFT MAGNETIC UNDERLAYERS

Provided herein, is an apparatus that includes a nonmagnetic substrate having a surface; and a plurality of overlying thin film layers forming a layer stack on the substrate surface. The layer stack includes a magnetically hard perpendicular magnetic recording layer structure and an underlying soft magnetic underlayer (SUL), wherein the sum of a magnetic thickness of the layer stack is a magnetic thickness of up to about 2 memu/cm̂2. 1. An apparatus comprising:a non-magnetic substrate having a surface; anda plurality of overlying thin film layers forming a layer stack on the substrate surface, the layer stack including a magnetically hard perpendicular magnetic recording layer structure and an underlying soft magnetic underlayer (SUL), wherein:the sum of a magnetic thickness of the layer stack is a magnetic thickness of up to about 2 memu/cm̂2.2. The apparatus of claim 1 , wherein:the magnetically hard perpendicular magnetic recording layer structure comprises a multilayer structure.3. The apparatus of claim 2 , wherein:the multilayer structure comprises a granular perpendicular magnetic recording layer wherein the magnetic grains are only weakly exchange coupled together, and an overlying continuous perpendicular magnetic recording layer wherein the magnetic grains are strongly exchange coupled laterally together.4. The apparatus of claim 3 , wherein:the granular perpendicular magnetic recording layer and the continuous perpendicular magnetic recording layer are ferromagnetically coupled together to form a coupled granular-continuous (CGC) structure.5. The apparatus of claim 3 , wherein:the granular perpendicular magnetic recording layer is from about 5 to about 30 nm thick and comprised of a Co-based alloy wherein segregation of magnetic grains occurs via formation of oxides, nitrides, or carbides at the boundaries between adjacent grains.6. The apparatus of claim 3 , wherein:the continuous perpendicular magnetic recording layer is from about 2 to about 15 nm ...

Perpendicular Magnetic Recording Write Head with Milling Defined Track Width

A main pole layer having at least a leading taper and trimmed pole tip portion is described. The leading taper increases head field up to ≧15000 Oe even for narrow track widths approaching 50 nm. For MAMR applications, a STO and trailing shield are sequentially formed on a trailing pole tip side. Furthermore, full side shields may be added to reduce fringing field. A preferred embodiment includes both of a leading taper and trailing taper at the pole tip where leading taper angle is between 20° and 60° and trailing taper angle is from 10° to 45°. A method is provided for forming various embodiments of the present invention. A key feature is that milling depth at an effective neck height distance is greater than or equal to the pole tip thickness. A self aligned STO may be formed by the same ion milling step that defines track width. 1. A PMR write head with a main pole layer having a planar top surface that is connected to an air bearing surface (ABS) by a tapered trailing side , and a planar bottom surface that is formed parallel to said planar top surface and connected to the ABS by a tapered leading side , said main pole layer comprises: (1) a pole tip formed along the ABS and having a leading edge where the tapered leading side terminates, and a trailing edge at the ABS where the tapered trailing side terminates, said trailing edge is located a pole tip thickness from the leading edge and has a track width in a cross-track direction;', '(2) a top surface that is part of the tapered trailing side and extends from said trailing edge to a first plane that is parallel to the ABS and is formed a neck height distance from the ABS;', '(3) two sides that are separated by a track width distance along the pole tip top surface, and connect the top surface to a pole tip bottom surface; and', '(4) the pole tip bottom surface that is part of the tapered leading side and having a first section formed along the tapered leading side between the ABS and a main pole surface that ...

MICROWAVE ASSISTED MAGNETIC RECORDING AND MAGNETIC STORAGE DEVICE

Disclosed is a technique of providing a large-capacity magnetic storage device at high device manufacturing yield while keeping the reliability, the magnetic storage device enabling recording on a perpendicular magnetic recording medium having distribution of characteristics in the circumferential direction as well at high track density of 500 kTPI or more that would be expected from the average characteristics of the medium. A recording condition from is selected for each sector from a parameter table that stores a set of at least two types of recording conditions by a microwave assisted magnetic recording head including a magnetic recording pole and a high-frequency magnetic field oscillator in the magnetic storage device, and information is recorded for each sector based on the condition. 1. A magnetic recording method , comprising the steps of:acquiring a recording condition on a perpendicular magnetic recording medium including sectors and having distribution of characteristics, the recording condition being for each sector and depending on the distribution of characteristics;setting a recording current and/or a driving current to be applied to a microwave assisted magnetic recording head for each sector in accordance with the recording condition, the microwave assisted magnetic recording head including a magnetic recording pole and a high-frequency magnetic field oscillator, the recording current exciting the magnetic recording pole and the driving current being applied to the high-frequency magnetic field oscillator; andperforming a recording operation with the set recording current and driving current.2. The magnetic recording method according to claim 1 , wherein the sectors include: a sector to be recorded with a first recording current and a first driving current and a sector to be recorded with a second recording current larger than the first recording current and a second driving current larger than the first driving current in accordance with the ...

Magnetic head pole including laminated structure having magnetic and nonmagnetic layers

According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a return pole opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between respective facing surfaces of the main pole and the return pole and configured to produce a high-frequency magnetic field. At least one of the main and return poles faces the high-frequency oscillator and includes a laminated structure portion includes a magnetic layer and a nonmagnetic layer laminated to one another.

CURRENT-PERPENDICULAR-TO-PLANE (CPP) READ SENSOR WITH Co-Fe BUFFER LAYERS

A current-perpendicular-to-plane (CPP) read sensor with Co—Fe buffer layers is proposed to improve pinning and magnetoresistance properties. The read sensor comprises first and second Co—Fe buffer layers in the lower and upper portions of a keeper layer structure, respectively, third and fourth Co—Fe buffer layers in the lower and upper portion of a reference layer structure, respectively, and a fifth Co—Fe buffer layer in the lower portion of a sense layer structure. The first buffer layer is adjacent to a pinning layer and has a specific composition to improve unidirectional-anisotropy pinning properties. The second and third buffer layers are adjacent to an antiparallel-coupling layer and have specific compositions to improve bidirectional-anisotropy pinning properties. The fourth and fifth buffer layers are adjacent to a barrier or spacer layer and have specific compositions to improve magnetoresistance properties. 1. A read sensor , comprising:a non-magnetic barrier or spacer layer sandwiched between upper and lower sensor stacks, the upper sensor stack comprising a magnetic sense layer structure, the lower sensor stack comprising a pinning layer, a keeper layer structure formed on the pinning layer, a non-magnetic antiparallel coupling layer formed on the keeper layer and a reference layer structure formed on the non-magnetic antiparallel coupling layer, wherein:the keeper layer structure comprises a Co—Fe buffer layer adjacent to the pinning layer, a second Co—Fe buffer layer adjacent to the non-magnetic antiparallel coupling layer and an intermediate layer comprising Co—Hf or Co—Fe—B sandwiched between the first and second Co—Fe buffer layers; andthe reference layer structure comprises:a third Co—Fe buffer layer adjacent to the non-magnetic antiparallel coupling layer;a first intermediate reference layer comprising a Co—Hf film formed on the third buffer layer; 'a fourth Co—Fe buffer layer formed of a ferromagnetic Co—Fe—B film formed on the second ...

Thin film with tuned grain size

An apparatus and associated method provides a magnetic writing element that may have at least a write pole tuned to a predetermined first grain size with a cryogenic substrate temperature. A magnetic shield can be formed with a predetermined second grain size that is tuned with the cryogenic substrate temperature.

Method of Forming a Non-Uniform Write Gap Perpendicular Writer for Shingle Writing

A method of forming a PMR writer is disclosed wherein at least one of a recessed center section in the write pole trailing edge and a center recessed trailing shield is used to improve the field gradient at track edge. In all embodiments, there is a non-uniform write gap formed between the trailing edge and the trailing shield. The recessed portion of the write pole trailing edge and/or center recess of the trailing shield has a thickness from 10 to 40 nm in a down-track direction and a width in a cross-track direction of 20 to 200 nm. The distance between the center recess and a corner of the trailing edge is from 20 to 80 nm. A sequence of steps is provided to fabricate the two embodiments of the present invention.

MAGNETIC RECORDING HEAD AND DISK DRIVE INCLUDING THE SAME

According to one embodiment, a magnetic recording head of a disk drive includes a main pole configured to generate a magnetic field in a direction perpendicular to a recording layer of a recording medium, a write shield magnetic pole opposite to a trailing side of the main pole with a gap, a coil configured to excite a magnetic flux in a magnetic circuit, and a high-frequency oscillator provided between a tip portion of the main pole on a side of the recording medium and the write shield magnetic pole to generate a high-frequency magnetic field. The write shield magnetic pole includes an end face opposite to the high-frequency oscillator and the end face is formed so that a distance from the main pole increases with an increasing distance from the recording medium. 1. A magnetic recording head comprising:a main pole configured to generate a magnetic field in a direction perpendicular to a recording layer of a recording medium,a write shield magnetic pole opposite to a trailing side of the main pole with a gap,a coil configured to excite a magnetic flux in a magnetic circuit formed by the main pole and the write shield magnetic pole, anda high-frequency oscillator provided between a tip portion of the main pole on a side of the recording medium and the write shield magnetic pole and configured to generate a high-frequency magnetic field, whereinthe write shield magnetic pole comprises an end face opposite to the high-frequency oscillator and the end face is formed so that a distance from the main pole increases with an increasing distance from the recording medium.2. The magnetic recording head of claim 1 , wherein the end face of the write shield magnetic pole is tilted from the main pole toward the trailing side with respect to a direction perpendicular to the recording layer of the recording medium so that the distance from the main pole increases with the increasing distance from the recording medium.3. The magnetic recording head of claim 2 , wherein the end ...

Method of Making a PMR Writer with Graded Side Shield

A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a graded side shield that is conformal to the shape of the pole tip at an upper portion of the shield but not conformal to the pole tip at a lower portion. The shield includes a trailing shield, that is conformal to the trailing edge of the pole tip and may include a leading edge shield that magnetically connects two bottom ends of the graded side shield.

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE

According to one embodiment, a magnetic recording head includes a magnetic pole and a shield. The shield has a first opposing surface opposing the magnetic pole. The first opposing surface includes a first opposing portion. The magnetic pole and the first opposing portion overlap in a first direction from the magnetic pole toward the shield. The first opposing portion includes a first protrusion. 117.-. (canceled)18. A magnetic recording head , comprising:a magnetic pole; anda shield having a first opposing surface opposing the magnetic pole,the magnetic pole having a second opposing surface opposing the shield,the first opposing surface including a first opposing portion, the magnetic pole and the first opposing portion overlapping in a first direction from the magnetic pole toward the shield,the first opposing portion including a first protrusion, a magnetic pole end portion in a track width direction; and', 'a magnetic pole central portion separated from the magnetic pole end portion in the track width direction,, 'the second opposing surface including a shield end portion, the magnetic pole end portion and the shield end portion overlapping in the first direction; and', 'a shield central portion, the magnetic pole central portion and the shield central portion overlapping in the first direction, and', 'a central portion distance between the magnetic pole central portion and the shield central portion being shorter than an end portion distance between the magnetic pole end portion and the shield end portion., 'the first opposing portion including19. The head according to claim 18 , wherein the end portion distance is not less than 1.1 times and not more than 1.5 times the central portion distance.20. The head according to claim 18 , wherein the second opposing surface includes a second protrusion.21. The head according to claim 18 , wherein the second opposing surface is a plane.22. The head according to claim 18 , whereinthe magnetic pole has a second opposing ...

Method of manufacturing perpendicular magnetic recording head

This method of manufacturing a perpendicular magnetic recording head includes: forming a water-soluble resin film on a base; forming a first resist pattern having an opening on the water-soluble resin film; selectively dissolving the water-soluble resin film exposed at a bottom of the opening with a developer to expose a part of a surface of the base; forming a non-magnetic oxide film to cover the opening and the exposed part of the surface of the base; forming a second resist pattern to fill the opening covered with the non-magnetic oxide film and then removing the first resist pattern and the non-magnetic oxide film; forming a first side shield and a second side shield on the base to allow them to face each other with the second resist pattern therebetween; and forming a magnetic pole between the first and the second side shields after removal of the second resist pattern.

SURFACE TREATMENT OF MAGNETIC RECORDING HEADS FOR IMPROVING THE ROBUSTNESS THEREOF

In one embodiment, a method includes forming a structure having a first region including a ceramic material, a second region including a plurality of particles disposed in a ceramic matrix material, and a magnetic head assembly disposed in the first region. The method also includes directing a first ion beam at a side of the first and second regions of the structure, the first ion beam including an oxidizing species to oxidize one or more portions of the particles located near the side of the second region, where the one or more oxidized portions of the particles protrude from the side of the ceramic matrix material of the second region. The method further includes directing a second ion beam at the side of the first and second regions of the structure, the second ion beam including an inert species to recess the first and second regions. 1. A method , comprising: a first region comprising a ceramic material,', 'a second region comprising a plurality of particles disposed in a ceramic matrix material, and', 'a magnetic head assembly disposed in the first region; and, 'forming a structure comprisingdirecting a first ion beam at a side of the first and second regions of the structure, wherein the first ion beam comprises an oxidizing species to oxidize one or more portions of the plurality of particles located near the side of the second region, wherein the one or more portions of the plurality of particles that are oxidized protrude from the side of the ceramic matrix material of the second region; anddirecting a second ion beam at the side of the first and second regions of the structure, wherein the second ion beam comprises an inert species to recess the first region and the second region by a predetermined amount.2. The method as recited in claim 1 , wherein the side of the first and second regions of the structure is a media facing side.3. The method as recited in claim 1 , wherein the ceramic material of the first region comprises one or more oxides.4. The ...

Coupled Soft Bias Scissor Type Sensor

A magnetic read head is provided, comprising a bottom magnetic shield, a first free magnetic layer, a second free magnetic layer, and a top magnetic shield, arranged from bottom to top in this order in a stacking direction from a leading side to a trailing side of the read head. A non-soft bias layer is positioned below the top magnetic shield and on a back side of the first and the second free magnetic layers. The top magnetic shield has a unidirectional anisotropy, the magnetic moments of the top and the bottom magnetic shields are canted relative to a plane of the first and the second free magnetic layers, and the top and the bottom magnetic shields are decoupled from the non-soft bias layer and not magnetically coupled to a soft bias layer. 1. A read head comprising:a bottom magnetic shield, a first free magnetic layer, a second free magnetic layer, and a top magnetic shield, arranged from bottom to top in this order in a stacking direction from a leading side to a trailing side of the read head, anda non-soft bias layer positioned below the top magnetic shield and on a back side of the first free magnetic layer and the second free magnetic layer, whereinthe top magnetic shield has a unidirectional anisotropy,magnetic moments of the top magnetic shield and the bottom magnetic shield are canted relative to a plane of the first free magnetic layer and the second free magnetic layer, andthe top magnetic shield and the bottom magnetic shield are decoupled from the non-soft bias layer and not magnetically coupled to a soft bias layer.2. The read head of claim 1 , whereinthe non-soft bias layer comprises an insulator layer.3. The read head of claim 1 , whereina magnetic moment of the top magnetic shield is perpendicular to a magnetic moment of the bottom magnetic shield in a plane perpendicular to an air bearing surface,the top magnetic shield is weakly coupled to the second free magnetic layer, andthe bottom magnetic shield is weakly coupled to the first free ...

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE COMPRISING THE SAME

According to one embodiment, a magnetic recording head includes a main magnetic pole which applies a recording magnetic field to a magnetic recording medium, an auxiliary magnetic pole which faces the main magnetic pole across a recording gap, a first magnetic bypass layer which is provided in a recording gap in a track direction, and a second magnetic bypass layer which is provided in the recording gap in the track direction and is arranged at a distance from the first magnetic bypass layer in a track width direction. 1. A magnetic recording head comprising:a main magnetic pole which applies a recording magnetic field to a magnetic recording medium;an auxiliary magnetic pole which faces the main magnetic pole across a recording gap;a first magnetic bypass layer provided in the recording gap in a track direction; anda second magnetic bypass layer provided in the recording gap in the track direction and arranged at a distance from the first magnetic bypass layer in a track width direction.2. The magnetic recording head of claim 1 , further comprising a nonmagnetic layer between the first magnetic bypass layer and the second magnetic bypass layer.3. The magnetic recording head of claim 1 , further comprising a magnetic flux control layer between the first magnetic bypass layer and the second magnetic bypass layer claim 1 , which includes a first conductive layer provided on the main magnetic pole claim 1 , an adjustment layer provided on the first conductive layer and comprising one magnetic material of iron claim 1 , cobalt or nickel claim 1 , and a second conductive layer electrically connecting the adjustment layer and the auxiliary magnetic pole claim 1 , and inverts a direction of magnetization in the adjustment layer by a spin torque.4. The magnetic recording head of claim 3 , whereinthe first conductive layer comprises one of copper, gold, silver, aluminum, iridium or nickel-aluminum alloy, andthe second conductive layer comprises one of tantalum, ruthenium, ...

Writer with HMTS (High Moment Trailing Shield) Aligned with Spin Layer

A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) includes a spin-torque oscillator (STO) and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO and the HMTS in a simultaneous process the HMTS and the STO layer are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO width.

Writer with HMTS (HIgh Moment Trailing Shield) Aligned with Spin Layer

A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) includes a spin-torque oscillator (STO) and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO and the HMTS in a simultaneous process the HMTS and the STO layer are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO width. 1. A method of fabricating a PMR magnetic writer that is configured for microwave assisted magnetic recording (MAMR) , comprising:providing a dielectric layer having a planar trailing-edge surface, an air-bearing surface (ABS) plane perpendicular to said planar trailing-edge surface and a trapezoidal trench formed symmetrically therein through said planar upper surface, projecting rearward in a direction perpendicular to said ABS plane and opening at said ABS surface; wherein said trench is wider at said planar trailing-edge surface and tapers downward to form a narrower leading edge; anda main magnetic pole (MP) emerging through said trench, said MP having a trapezoidal planar ABS face symmetrically positioned within said trench at an air-bearing surface (ABS) plane, wherein said MP face is separated from walls of said trench by symmetrically placed side gaps (SG) and a leading-edge gap (LG); anda uniformly thick spin torque oscillator (STO) layer formed contiguous with said planar upper surface of said dielectric layer, wherein said STO layer covers said planar upper surface, covers openings of said SGs and covers said trailing edge surface of said MP; thenforming a uniformly thick, high moment trailing shield (HMTS) layer contiguously over said STO layer; thentrimming said HMTS and said STO layers in a single trimming process so that said two layers are aligned with ...

SPIN TRANSFER TORQUE DEVICE WITH OXIDE LAYER BENEATH THE SEED LAYER

A spin transfer torque (STT) device is formed on an electrically conductive substrate and includes a ferromagnetic free layer near the substrate, a ferromagnetic polarizing layer and a nonmagnetic spacer layer between the free layer and the polarizing layer. A multilayer structure is located between the substrate and the free layer. The multilayer structure includes a metal or metal alloy seed layer for the free layer and an intermediate oxide layer below and in contact with the seed layer. The intermediate oxide layer reflects spin current from the free layer and thus reduces undesirable damping of the oscillation of the free layer's magnetization by the seed layer. 1. A spin transfer torque (STT) device comprising:an electrically conductive substrate;a ferromagnetic free layer;an intermediate oxide layer between the substrate and the free layer and comprising an oxide of one or more of Mg, Al, Ti and Ta;a metal or metal alloy seed layer for the free layer on and in contact with the intermediate oxide layer, wherein the free layer is on and in contact with the seed layer;a ferromagnetic polarizing layer;a nonmagnetic spacer layer between the free layer and the polarizing layer, wherein the free layer is located between the substrate and the polarizing layer; andan electrically conductive layer on the polarizing layer.2. The STT device of wherein the intermediate oxide layer consists of MgO.3. The STT device of wherein the MgO oxide layer has a thickness greater than or equal to 0.1 nm and less than or equal to 0.5 nm.4. The STT device of wherein the seed layer comprises one or more films selected from one or more of Cu claim 1 , Cr claim 1 , Ta claim 1 , Ru claim 1 , Hf claim 1 , Nb and NiAl.5. The STT device of wherein the seed layer comprises a film selected from a Ru film and a NiAl film.6. The STT device of wherein the seed layer has a thickness greater than or equal to 1 nm and less than or equal to 9 nm.7. A STT magnetic random access memory (MRAM) cell ...

MAGNETIC RECORDING HEAD AND DISK APPARATUS WITH THE SAME

According to one embodiment, a magnetic recording head includes a main pole, a write shield facing the main pole with a write gap interposed therebetween, a recording coil, and a high-frequency oscillator including an oscillation layer provided within the write gap between an end portion of the main pole and the write shield, and an intermediate layer and a spin-injection layer stacked on the oscillation layer. The oscillation layer, the intermediate layer and the spin-injection layer are stacked in a direction intersecting the gap length direction of the write gap, and at least one of the oscillation layer and the spin-injection layer is electrically connected to one of the main pole and the write shield. 1. A magnetic recording head comprising:a main pole configured to apply a recording magnetic field to a recording layer of a recording medium;a write shield facing the main pole with a write gap interposed therebetween;a recording coil configured to cause the main pole to generate a magnetic field; anda high-frequency oscillator comprising an oscillation layer provided within the write gap between an end portion of the main pole and the write shield, and an intermediate layer and a spin-injection layer stacked on the oscillation layer,wherein the oscillation layer, the intermediate layer and the spin-injection layer are stacked in a direction intersecting a gap length direction of the write gap; andat least one of the oscillation layer and the spin-injection layer is electrically connected to one of the main pole and the write shield.2. The magnetic recording head of claim 1 , which further comprises a medium facing surface configured to face a recording medium claim 1 , wherein the oscillation layer claim 1 , the intermediate layer and the spin-injection layer of the high-frequency oscillator are arranged side by side on a single plane that intersects the gap length direction of the write gap and is perpendicular to the medium facing surface.3. The magnetic ...

Plasmonic funnel for focused optical delivery to a metallic medium

An apparatus includes a transducer including a plasmonic funnel having first and second ends with the first end having a smaller cross-sectional area than the second end, and a first section positioned adjacent to the first end of the plasmonic funnel, and a first waveguide having a core, positioned to cause light in the core to excite surface plasmons on the transducer.

CURRENT-PERPENDICULAR-TO-PLANE MAGNETO-RESISTANCE EFFECT ELEMENT

The CPPGMR element of the present invention has an orientation layer formed on a substrate to texture a Heusler alloy into a (100) direction, an underlying layer that is an electrode for magneto-resistance measurement stacked on the orientation layer , a lower ferromagnetic layer and an upper ferromagnetic layer each stacked on the underlying layer and made of a Heusler alloy, a spacer layer sandwiched between the lower ferromagnetic layers and the upper ferromagnetic layers , and a cap layer stacked on the upper ferromagnetic layer for surface-protection. This manner makes it possible to provide, inexpensively, an element using a current-perpendicular-to-plane giant magneto-resistance effect (CPPGMR) of a thin film having a trilayered structure of a ferromagnetic metal/a nonmagnetic metal/a ferromagnetic metal, thereby showing excellent performances.

MAGNETIC DISK DEVICE

According to one embodiment, a magnetic disk device comprises an actuator configured to drive a head stack assembly including a plurality of magnetic heads, a preamplifier connected to each of the magnetic heads with a plurality of traces, and a control section configured to control read/write of the plurality of magnetic heads from/to the magnetic disk through the preamplifier. While a first magnetic head among the plurality of magnetic heads executes a write operation, the control section interrupts access of a second magnetic head in proximity to the first magnetic head to the magnetic disk. 1. A magnetic disk device comprising:an actuator configured to drive a head stack assembly including a plurality of magnetic heads;a preamplifier connected to each of the magnetic heads with a plurality of traces; anda control section configured to control read/write of the plurality of magnetic heads from/to the magnetic disk through the preamplifier, whereinwhile a first magnetic head among the plurality of magnetic heads executes a write operation, the control section interrupts access of a second magnetic head in proximity to the first magnetic head to the magnetic disk.2. The magnetic disk device of claim 1 , whereinthe interrupted access is a write operation of the second magnetic head, andthe control section executes the interrupted write operation of the second magnetic head after the write operation of the first magnetic head is completed.3. A magnetic disk device comprising:an actuator configured to drive a head stack assembly including a plurality of magnetic heads;a preamplifier connected to each of the magnetic heads with a plurality of traces; anda control section configured to control read/write of the plurality of magnetic heads from/to the magnetic disk through the preamplifiers, whereinwhile a first magnetic head among the plurality of magnetic heads executes a write operation, the control section reduces an operating voltage of a second magnetic head ...

DEVICES AND METHODS USING RECESSED ELECTRON SPIN ANALYZERS

In certain embodiments, an apparatus includes a top shield, bottom shield, polarizer, nonmagnetic conductor layer, and a sensor stack having a first sensor layer. The sensor stack is positioned at a distance recessed from a first plane. The nonmagnetic conductor layer is positioned between the polarizer and the first sensor layer. A magnetization of the first sensor layer is arranged and configured to move in the same direction as a magnetization of the polarizer. 1. An apparatus comprising:a top shield and a bottom shield both positioned at a first plane;a polarizer and a nonmagnetic conductor layer both positioned at the first plane between the top and bottom shields; and wherein the nonmagnetic conductor layer is positioned between the polarizer and the first sensor layer,', 'wherein a magnetization of the first sensor layer is arranged and configured to move in the same direction as a magnetization of the polarizer., 'a sensor stack having a first sensor layer and positioned at a distance recessed from the first plane,'}2. The apparatus of claim 1 , wherein the distance is 200 nm or less.3. The apparatus of claim 1 , further comprising:a cap layer positioned between the top and bottom shields.4. The apparatus of claim 1 , further comprising:a current path through the top shield, polarizer, nonmagnetic conductor layer, first sensor layer, and remaining portion of the sensor stack.5. The apparatus of claim 1 , wherein the magnetization of the first sensor layer changes in response to a spin momentum transfer of polarized electrons from the polarizer.6. The apparatus of claim 5 , wherein an electron spin from the polarizer is passed through the nonmagnetic layer to the first sensor layer.7. The apparatus of claim 1 , wherein the sensor stack is a current perpendicular-to-plane (CPP) stack.8. The apparatus of claim 1 , wherein the sensor stack is a tunneling-magneto resistive (TMR) stack.9. The apparatus of claim 1 , wherein an effective shield-to-shield spacing is ...

CURRENT-PERPENDICULAR-TO-PLANE GIANT MAGNETORESISTIVE ELEMENT, PRECURSOR THEREOF, AND MANUFACTURING METHOD THEREOF

Provided is a precursor of a current-perpendicular-to-plane giant magnetoresistive element having a laminated structure of ferromagnetic metal layer/nonmagnetic metal layer/ferromagnetic metal layer, the precursor having a nonmagnetic intermediate layer containing a non-magnetic metal and an oxide in a predetermined ratio such that the distribution thereof is nearly uniform at the atomic level. Also provided is a current-perpendicular-to-plane giant magnetoresistive element having a current-confinement structure (CCP) which has: a current confinement structure region made of a conductive alloy and obtained by heat-treating a laminated structure of a ferromagnetic metal layer and a nonmagnetic intermediate layer at a predetermined temperature; and a high-resistance metal alloy region containing an oxide and surrounding the current confinement structure region. 1. A precursor of a current-perpendicular-to-plane giant magnetoresistance element having a laminate structure of a ferromagnetic metal layer/a non-magnetic metal layer/a ferromagnetic metal layer , comprisingthe non-magnetic spacer layer containing a non-magnetic metal and an oxide at a predetermined ratio and containing the non-magnetic metal and the oxide in a roughly uniform manner at an atomic level.2. The precursor of a current-perpendicular-to-plane giant magnetoresistance element according to claim 1 , whereinthe non-magnetic metal is at least one substance selected from among Cu, Ag, Au and an alloy thereof, and{'sub': 2', '3', '2', '2', '3, 'the oxide is at least one substance selected from among InO, ZnO, SnO, GaO, and a mixture thereof.'}3. The precursor of a current-perpendicular-to-plane giant magnetoresistance element according to claim 2 , whereinthe non-magnetic metal is Ag,{'sub': 2', '3, 'the oxide is InZnO (a mixture of InOand ZnO), and'}the precursor of a current-perpendicular-to-plane giant magnetoresistance element comprises the non-magnetic spacer layer consisting of a AgInZnO single- ...

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS

According to an embodiment, a magnetic recording head includes a main magnetic pole and a spin torque oscillator. The spin torque oscillator includes a first perpendicular free layer, a second perpendicular free layer, and a first spacer layer, each of the first perpendicular free layer and the second perpendicular free layer including a magnetic anisotropy axis in a direction perpendicular to a film plane of the spin torque oscillator. An effective perpendicular magnetic anisotropy magnetic field of the first perpendicular free layer is smaller than an effective perpendicular magnetic anisotropy magnetic field of the second perpendicular free layer, and a current is applied from the first perpendicular free layer side to the second perpendicular free layer side. 1. A magnetic recording head comprising:a main magnetic pole which generates a recording magnetic field; anda spin torque oscillator which generates a high frequency magnetic field, the spin torque oscillator comprising a pair of electrode layers and a multilayer film provided between the pair of electrode layers, the multilayer film comprising a first perpendicular free layer in which magnetization is rotatable, a second perpendicular free layer in which magnetization is rotatable, and a first spacer layer provided between the first perpendicular free layer and the second perpendicular free layer, each of the first perpendicular free layer and the second perpendicular free layer including a magnetic anisotropy axis in a direction perpendicular to a film plane of the spin torque oscillator, wherein an effective perpendicular magnetic anisotropy magnetic field of the first perpendicular free layer is smaller than an effective perpendicular magnetic anisotropy magnetic field of the second perpendicular free layer, and a current is applied from the first perpendicular free layer side to the second perpendicular free layer side through the pair of electrode layers.2. The magnetic recording head according to ...

MAGNETIC RECORDING WRITE APPARATUS HAVING A STEPPED CONFORMAL TRAILING SHIELD

A magnetic write apparatus has a media-facing surface (MFS), a pole having leading and trailing surfaces, a trailing shield having a pole-facing surface, a write gap and coil(s). The pole's trailing surface has a portion adjoining the MFS and oriented at a nonzero, acute bevel angle from a direction perpendicular to the MFS. The pole-facing surface includes a first portion adjoining the MFS and oriented at a first angle substantially the same as the bevel angle, a second portion oriented at a second angle greater than the first trailing shield angle, and a third portion oriented at a third angle substantially the same as the first angle. The write gap has first, second and third thicknesses adjacent to the first, second and third portions of the pole-facing surface, respectively. The first thickness is constant. The second thickness varies. The third thickness is constant and greater than the first thickness. 1. A magnetic write apparatus comprising:a pole comprising a pole tip occupying a portion of a media facing surface and a yoke extending from the pole tip in a yoke direction that extends in a direction perpendicular to the media facing surface, wherein the pole tip comprises a pole trailing surface having a first trailing surface portion that extends to a first distance from the media facing surface in the yoke direction at a pole bevel angle; anda trailing shield adjacent to the pole trailing surface of the pole tip, wherein the trailing shield comprises a shield trailing surface facing the pole trailing surface, and wherein the shield trailing surface comprises a first portion, a second portion, and a third portion extending in the yoke direction,wherein the third portion extends beyond the first distance in the yoke direction.2. The magnetic write apparatus of claim 1 , further comprising a write gap between the pole trailing surface and the shield trailing surface claim 1 , wherein the write gap comprises a first thickness between the first portion of the ...

Graded Bevel Tapered Write Pole Design for Field Enhancement

A structure and a process for a perpendicular write pole that provides increased magnetic flux at the ABS is disclosed. This is accomplished by increasing the amount of write flux that originates above the write gap, without changing the pole taper at the ABS. Three embodiment of the invention are discussed. 1. A perpendicular magnetic write pole for magnetic recording , having an air bearing surface (ABS) , comprising:a first magnetic layer, having a first upper surface and a first planar edge that is normal to said first upper surface and that functions as the ABS;on said first magnetic layer, a second magnetic layer having a second upper surface and a second edge that is coplanar with said first edge;a write gap in the form of a non-magnetic layer having a third edge that is symmetrically located between, that is coplanar with, and that fully contacts, said first and second edges;said non-magnetic layer further comprising a first part that extends from said third edge at an angle between about 10 and 45 degrees as far as said second upper surface and a second part, connected to said first part, that lies on said second upper surface;said first and third edges having, in combination, the shape of a trapezoid, having a first maximum width, whose non-parallel sides converge, at a first taper angle, down to said first magnetic layer's lower surface; andwherein said second edge has a maximum width that exceeds said first maximum width and has the shape of a rectangle which overlaps said third edge by at least 20% of said first maximum width;whereby additional flux is directed to the ABS without the need to increase said first taper angle.2. The perpendicular magnetic write pole described in wherein said first layer of magnetic material has a thickness in the range of from 0.2 to 0.4 microns.3. The perpendicular magnetic write pole described in wherein said second layer of magnetic material has a thickness in the range of from 0.05 to 0.2 microns.4. The perpendicular ...

Graded Bevel Tapered Write Pole Design for Field Enhancement

A structure and a process for a perpendicular write pole that provides increased magnetic flux at the ABS is disclosed. This is accomplished by increasing the amount of write flux that originates above the write gap, without changing the pole taper at the ABS. Three embodiment of the invention are discussed. 1. A perpendicular magnetic write pole for magnetic recording , having an air bearing surface (ABS) , comprising:A main pole in the form of a first magnetic layer, having a first upper surface and a first planar edge that is normal to said first upper surface, said first planar edge being the ABS;on said first magnetic layer, a first non-magnetic layer having a second edge that is symmetrically located between, that is coplanar with, and that fully contacts, said first edge;said first non-magnetic layer further comprising a first part that extends from said second edge at an angle between about 10 and 45 degrees as far as said first upper surface and a second part, connected to said first part, that lies on said first upper surface;a second non-magnetic layer that is on all of said second part and on all of said first part with the exception of section of said first part that extends for a distance from said second edge; anda trailing shield that extends upwards from contact with said first and second non-magnetic layers, said trailing shield having an edge that is coplanar with said first and second edges, whereby a write gap exists that is narrower at the ABS and wider away from it, thereby reducing flux leakage from said main pole to said trailing shield and delivering more flux at the ABS.2. The perpendicular magnetic write pole described in wherein said first layer of magnetic material has a thickness in the range of from 0.2 to 0.4 microns.3. The perpendicular magnetic write pole described in wherein said first non-magnetic layer has a thickness of up to 0.1 microns.4. The perpendicular magnetic write pole described in wherein said second non-magnetic ...

Stitched pole having a tapered tip

In one general embodiment, a magnetic head includes a stitch pole; and a main pole formed adjacent the stitch pole, wherein an end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. In another general embodiment, a magnetic head includes a stitch pole being a laminate of at least two magnetic layers separated b a nonmagnetic layer; and a main pole formed adjacent the stitch pole. An end region of the stitch pole closest to an bearing surface of the bead tapers towards the main pole. An average angle of the taper of the end region of the stitch pole is between about 20 and about 45 degrees. Such head may be implemented in a data storage system.

Wrap-Around Shielded Writer with Highly Homogeneous Shield Material

A perpendicular magnetic recording (PMR) head is fabricated with a main pole shielded laterally by a pair of side shields, shielded above by a trailing shield and shielded optionally below by a leading shield. The shields and the seed layers on which they are formed are formed of materials having substantially the same physical characteristics including the same material composition, the same hardness, the same response to processes such as ion beam etching (IBE), chemical mechanical polishing (CMP), mechanical lapping, such as the slider ABS lapping, the same coefficient of thermal expansion (CTE) as well as the same B. Optionally, the trailing shield may be formed on a high Bseed layer to provide the write head with improved down-track performance.

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE

According to one embodiment, a magnetic recording head records information in a magnetic recording medium by shingled magnetic recording. The magnetic recording head includes a magnetic pole and a shield opposing the magnetic pole. The magnetic pole has a shield-opposing surface opposing the shield. The shield-opposing surface includes a first portion and a second portion. A position of the second portion in a track width direction is different from a position of the first portion in the track width direction, the track width direction intersecting a first direction from the magnetic pole toward the shield. The first portion records the information in the magnetic recording medium after the second portion in the shingled magnetic recording. A first distance between the first portion and the shield is shorter than a second distance between the second portion and the shield. The shield-opposing surface is tilted with respect to the first direction. 1. A magnetic recording head , comprising:a magnetic pole; anda shield opposing the magnetic pole,the magnetic recording head recording information in a magnetic recording medium by shingled magnetic recording,the magnetic pole having a shield-opposing surface opposing the shield,the shield-opposing surface including a first portion and a second portion,a position of the second portion in a track width direction being different from a position of the first portion in the track width direction, the track width direction intersecting a first direction from the magnetic pole toward the shield,the first portion recording the information in the magnetic recording medium after the second portion in the shingled magnetic recording,a first distance between the first portion and the shield being shorter than a second distance between the second portion and the shield,the shield-opposing surface being tilted with respect to the first direction.2. A magnetic recording head , comprising:a magnetic pole; anda shield opposing the ...

Magnetic recording head and magnetic recording and reproducing device

According to one embodiment, a magnetic recording head includes a magnetic pole and a shield. The shield has a first opposing surface opposing the magnetic pole. The first opposing surface includes a first opposing portion. The magnetic pole and the first opposing portion overlap in a first direction from the magnetic pole toward the shield. The first opposing portion includes a first protrusion.

MAGNETIC RECORDING HEAD AND DISK APPARATUS INCLUDING THE SAME

According to one embodiment, a magnetic recording head includes a main magnetic pole configured to apply a recording magnetic field to a recording layer of a recording medium, a spin torque oscillator adjacent to the main magnetic pole in a vicinity of a disk-facing surface confronting the recording medium, a recording coil configured to excite the main magnetic pole, a recording current control circuit configured to supply a recording current to the recording coil, a constant current supply circuit configured to supply a constant current to the spin torque oscillator, and an inverted current supply circuit configured to supply an inverted current having a polarity different from the constant current to the spin torque oscillator. 1. A magnetic recording head comprising:a main magnetic pole configured to apply a recording magnetic field to a recording layer of a recording medium;a spin torque oscillator adjacent to the main magnetic pole in a vicinity of a disk-facing surface confronting the recording medium;a recording coil configured to excite the main magnetic pole;a recording current control circuit configured to supply a recording current to the recording coil;a constant current supply circuit configured to supply a constant current to the spin torque oscillator; andan inverted current supply circuit configured to supply an inverted current having a polarity different from the constant current to the spin torque oscillator.2. The magnetic recording head of claim 1 , wherein the inverted current supply circuit is configured to supply the inverted current to the spin torque oscillator in synchronization with a polarity inversion of the recording current.3. The magnetic recording head of claim 2 , wherein the inverted current supply circuit is configured to supply the inverted current to the spin torque oscillator during a period from a time at which an absolute value of the recording current starts to become low to a time at which the absolute value of the ...

STORAGE ELEMENT

A storage element is provided. The storage element includes a memory layer; a fixed magnetization layer; an intermediate layer including a non-magnetic material; wherein the intermediate layer is provided between the memory layer and the fixed magnetization layer; wherein the fixed magnetization layer includes at least a first magnetic layer, a second magnetic layer, and a non-magnetic layer, and wherein the first magnetic layer includes a CoFeB composition. A memory apparatus and a magnetic head are also provided. 1. A storage element comprising: a first layer having a first magnetization state;', 'a second layer having a second magnetization state; and', 'an intermediate layer provided between the first layer and the second layer,', 'wherein the second layer includes at least a first magnetic layer, a second magnetic layer, and a non-magnetic layer,', 'wherein the first magnetic layer contacts the intermediate layer, and', 'wherein the first layer contacts the intermediate layer and has a magnetization substantially perpendicular to a surface of the first layer., 'a layer structure including'}2. The storage element according to claim 1 , wherein the first magnetic layer includes Co claim 1 , Fe claim 1 , and B.3. The storage element according to claim 1 , wherein the second magnetization state is a fixed magnetization state.4. The storage element according to claim 1 , wherein the first magnetization state is configured to be changed by a current.5. The storage element according to claim 1 , wherein the intermediate layer includes one or more of magnesium oxide claim 1 , aluminum oxide claim 1 , aluminum nitride claim 1 , SiO claim 1 , BiO claim 1 , MgF claim 1 , CaF claim 1 , SrTiO claim 1 , AlLaO claim 1 , and AlNO.6. The storage element according to claim 1 , wherein a thickness of the intermediate layer is no more than 1.5 nm.7. The storage element according to claim 1 , wherein the second magnetic layer does not contact the intermediate layer claim 1 , ...

MAGNETIC RECORDING HEAD AND DISK DEVICE WITH THE SAME

According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer included in a recording medium, a trailing shield opposing the main pole in a down-track direction, with a write gap interposed therebetween, a pair of side shields opposing the main pole on opposite sides of the main pole in a cross-track direction, with respective gaps interposed therebetween, a recording coil configured to cause the main pole to generate a magnetic field, a first high-frequency oscillator interposed between the main pole and one of the side shields, and a second high-frequency oscillator interposed between the main pole and the other side shield. 1. A magnetic head comprising:a main pole configured to apply a recording magnetic field to a recording layer included in a recording medium;a trailing shield opposing the main pole in a down-track direction, with a write gap interposed therebetween;a pair of side shields opposing the main pole on opposite sides of the main pole in a cross-track direction, with respective gaps interposed therebetween;a recording coil configured to cause the main pole to generate a magnetic field;a first high-frequency oscillator provided between the main pole and one of the side shields and electrically connected to the main pole and the one side shield, the main pole, the first high-frequency oscillator and the one side shield constituting a power distribution circuit configured to distribute power to the main pole, the first high-frequency oscillator and the one side shield in this order; anda second high-frequency oscillator provided between the main pole and the other side shield and electrically connected to the main pole and the other side shield, the main pole, the second high-frequency oscillator and the other side shield constituting a power distribution circuit configured to distribute power to the main pole, the second high-frequency oscillator and the other side shield in this ...

Perpendicular Magnetic Recording (PMR) Write Head with Improved Shapes of Side Shield and Main Pole

A perpendicular magnetic recording writer is disclosed with a side shield separated from a write pole side by a gap layer at an air bearing surface (ABS) where the side shield has a first sidewall facing the write pole with an end at height (h) from the ABS, and a second sidewall at height h that is parallel to the ABS. The write pole side is curved such that a first portion proximate to the ABS is at an angle of 0 to 40 degrees with respect to a center plane formed orthogonal to the ABS, and a second section proximate to a corner where the curved side connects with a flared main pole side is formed substantially parallel to the second sidewall. When h is 30-80 nm, and the corner is 80-150 nm from the ABS, overwrite is improved while cross-track field gradient is enhanced. 1. A perpendicular magnetic recording (PMR) writer , comprising:(a) a main pole with a leading edge at an air bearing surface (ABS) and formed at a first plane, and a trailing edge at the ABS and formed along a second plane where the first and second planes are parallel to each other and are orthogonal to the ABS, and to a center plane formed equidistant between two main pole sides that connect the leading edge to the trailing edge;(b) a gap layer surrounding the main pole at the ABS and comprising a write gap that contacts the trailing edge and has a first cross-track width, and a side gap layer adjoining the main pole sides and leading edge;(c) a composite side shield at the ABS and on each side of the center plane, comprising;(1) a 19-24 kG magnetic (first hot seed) layer with an inner sidewall adjoining the side gap layer and facing a write pole portion of the main pole, a second sidewall formed parallel to the ABS at a first height therefrom, and an outer side facing away from the write pole portion and adjoining a 10-16 kG magnetic layer; and(2) the 10-16 kG magnetic layer that has a third sidewall connected to an end of the second sidewall, the third sidewall has a far end at a side of the ...

PERPENDICULAR TIMING-BASED SERVO HEADS

A perpendicular recording head and tape having some perpendicular component of magnetization are provided. The perpendicular recording head may contain at least two non-parallel poles such that each set of such poles may form the writing poles for recording a timing based servo band onto the tape medium. 1. A perpendicular recording head containing at least two non-parallel writing poles that are simultaneously energized.2. The perpendicular recording head of wherein the at least two non-parallel writing poles comprise a timing based servo pattern.3. The perpendicular recording head of comprising a substrate including a magnetic yoke claim 1 , the at least two non-parallel writing poles formed on the magnetic yoke.4. The perpendicular recording head of claim 3 , further comprising a substantially non-magnetic thin film layer surrounding the at least two non-parallel writing poles.5. A flexible perpendicular recording medium that contains a timing based servo format.6. A method of formatting a flexible medium using a perpendicular recording head containing at least two non-parallel writing poles that are simultaneously energized. Longitudinal Magnetic Recording (LMR) and Perpendicular Magnetic Recording (PMR) generally refer to the ability of a recording medium to support in-plane (e.g., LMR) and out-of-plane (e.g., PMR) modes of magnetization. This ability can largely be determined by the physics of the magnetic materials.PMR materials have been long studied for their potentially many fundamental advantages over LMR materials at ever higher bit densities. However, the well-established recording technology of LMR decreased the media thickness, increased the media coercivity, and made other incremental improvements that kept PMR developments generally at bay. Indeed, for more than 25 years after the introduction of PMR in research and development circles, LMR continued its dominance in the commercial marketplace.Nonetheless, LMR has begun to run into the wall of ...

SCISSOR UNIDIRECTIONAL BIASING WITH HARD BIAS STABILIZED SOFT BIAS

In one embodiment, an apparatus includes a scissor sensor stack, a soft bias layer positioned behind the scissor sensor stack in an element height direction, the soft bias layer including a soft magnetic material, and a hard bias layer, at least a portion thereof being positioned behind the soft bias layer in the element height direction, the hard bias layer including a hard magnetic material having an initialization magnetization that is perpendicular to a media-facing surface of the apparatus to provide unidirectional anisotropy to the soft bias layer, wherein the scissor sensor stack includes a first free layer, a second free layer positioned above the first free layer, and a barrier layer positioned between the first free layer and the second free layer. Other apparatuses and methods for forming such apparatuses are described in more embodiments. 1. An apparatus , comprising: a first free layer;', 'a second free layer positioned above the first free layer; and', 'a barrier layer positioned between the first free layer and the second free layer;, 'a scissor sensor stack, comprisinga soft bias layer positioned behind the scissor sensor stack in an element height direction, the soft bias layer comprising a soft magnetic material; anda hard bias layer, at least a portion thereof being positioned behind the soft bias layer in the element height direction, the hard bias layer comprising a hard magnetic material having an initialization magnetization that is perpendicular to a media-facing surface of the apparatus to provide unidirectional anisotropy to the soft bias layer.2. The apparatus as recited in claim 1 , wherein the scissor sensor stack further comprises a cap layer positioned above the second free layer.3. The apparatus as recited in claim 1 , wherein at least one portion of an upper surface of the hard bias layer is positioned closer to the media-facing surface of the apparatus than any portion of a lower surface of the hard bias layer claim 1 , and wherein ...

MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING INCLUDING TWO SIDE SHIELDS

A first side shield has a first sidewall and a second sidewall. A second side shield has a third sidewall and a fourth sidewall. The distance between the first sidewall and the third sidewall decreases with increasing proximity to the top surface of a substrate. The second and fourth sidewalls are close to perpendicular to the top surface of the substrate. Each of the second and fourth sidewalls has an edge farthest from the top surface of the substrate, the edge being parallel to the medium facing surface. The main pole has a first, a second, a third and a fourth side surface. The first side surface is opposed to the first sidewall. A portion of the second side surface is opposed to the second sidewall. The third side surface is opposed to the third sidewall. A portion of the fourth side surface is opposed to the fourth sidewall. 1. A magnetic head for perpendicular magnetic recording , comprising:a medium facing surface configured to face a recording medium;a coil configured to produce a magnetic field corresponding to data to be written on the recording medium;a main pole configured to allow a magnetic flux corresponding to the magnetic field produced by the coil to pass, and configured to produce a write magnetic field for writing the data on the recording medium by means of a perpendicular magnetic recording system;a write shield formed of a magnetic material;a gap part formed of a nonmagnetic material and provided between the main pole and the write shield;a return path section;a nonmagnetic layer; anda substrate having a top surface, whereinthe coil, the main pole, the write shield, the gap part, the return path section and, the nonmagnectic layer are disposed above the top surface of the substrate,the write shield includes a bottom shield, a top shield, a first side shield and a second side shield, the first side shield and the second side shield being located on opposite sides of the main pole in a track width direction,the bottom shield has an end face ...

Spin Transfer Torque Oscillator (STO) with Spin Torque Injection to a Flux Generating Layer (FGL) from Two Sides

A spin torque reversal assisted magnetic recording (STRAMR) structure is disclosed wherein a spin torque oscillator (STO) is formed in the write gap (WG) and generates one or both of a radio frequency (RF) field on a magnetic bit to lower the required write field during a write process, and a spin torque on a field generation layer (FGL) in the STO that flips a FGL magnetization to a direction opposing the WG field thereby increasing reluctance in the WG and causing larger write field output from the main pole (MP). The FGL is between two spin preserving layers that each conduct spin polarized current from an adjoining spin polarization (SP) layer. Current is applied from the MP and trailing shield to the SP layers, and returns to a direct current source through a lead from the FGL. STO sidewalls are self-aligned to a MP tip upper portion.

METHOD FOR MAKING A PERPENDICULAR MAGNETIC RECORDING WRITE HEAD WITH WRITE POLE HAVING THIN SIDE GAPS AND THICKER LEADING GAP

Ionized physical vapor deposition (IPVD) is used to form a magnetic recording disk drive write head main pole with thin side gap layers and a thicker leading gap layer. A metal or metal alloy is formed by IPVD in a trench with a bottom and outwardly sloping sidewalls. An optional Ru seed layer is deposited on the metal or metal alloy. This is followed by atomic layer deposition (ALD) of a Ru smoothing layer. If the IPVD results in metal or metal alloy side gap layers with a rough surface, the ALD process is modified, resulting in a smooth Ru smoothing layer that does not replicate the rough surface of the side gap layers. 1. A method for depositing a layer of material in a substrate having a trench with a bottom and outwardly sloped sidewalls comprising:depositing into the trench, by ionized physical vapor deposition, material selected from a metal and a metal alloy to form a bottom layer of said material and sidewall layers of said material, wherein said sidewall layers are thinner than said bottom layer.2. The method of wherein said material is selected from a NiNb alloy claim 1 , a NiTa alloy and a NiCr alloy.3. The method of wherein the thickness of said bottom layer is at least 1.5 times as thick as the thickness of said sidewall layers.4. The method of further comprising depositing a seed layer of ruthenium (Ru) on said bottom layer and said sidewall layers.5. The method of further comprising depositing a smoothing layer of Ru on said Ru seed layer by atomic layer deposition using RuOand H claim 4 , wherein the RuOacts as a precursor that reduces to RuOon said Ru seed layer and the Hacts to reduce RuOto Ru.6. The method of wherein said sidewall layers have a surface substantially rougher than the surface of said bottom layer claim 5 , wherein the Ru seed layer generally replicates the surface of said sidewall layers claim 5 , and further comprising claim 5 , after the RuOhas formed on the Ru seed layer claim 5 , continuing to introduce RuO.7. The method of ...

SPIN ORBIT TORQUE-BASED SPINTRONIC DEVICES USING L10- ORDERED ALLOYS

In one embodiment, a SOT device provides current-induced perpendicular magnetization switching in a single magnetic layer, such as a L1-ordered magnetic alloy layer of FePt alloy, CoPt alloy, FePd alloy or another atomically layered magnetic alloy. The SOT may originate from the large spin orbit coupling in these alloys. Depending on the implementation, the SOT device may take the form of a SOT-MRAM, a spin memristor, a current-assisted magnetic recording media, or other type of device. 1. A spin-orbit torque (SOT) device comprising:a substrate defining a plane; and{'sub': 0', '0, 'an L1-ordered magnetic alloy layer parallel to the substrate, the L1-ordered magnetic alloy layer having a perpendicular magnetization direction that is switchable via SOT in response to application of an in-plane current to the SOT device.'}2. The SOT device of claim 1 , wherein the L1-ordered magnetic alloy layer comprises iron-platinum (FePt) alloy claim 1 , cobalt-platinum (CoPt) alloy or iron-palladium (FePd) alloy.3. The SOT device of claim 1 , wherein the SOT device is a SOT-magnetic random access memory (MRAM).4. The SOT device of claim 3 , further comprising:a pinned layer,wherein the perpendicular magnetization direction is parallel or anti-parallel to a magnetization direction of the pinned layer.5. The SOT device of claim 3 , further comprising:a biased antiferromagnet (AFM),{'sub': '0', 'wherein the L1-ordered magnetic alloy is switchable absent the presence of an external magnetic field.'}6. The SOT device of claim 1 , wherein the SOT device is a spin memristor.7. The SOT device of claim 6 , wherein the perpendicular magnetization direction is switchable to tune a ratio between magnetization areas having perpendicular magnetization direction in a first direction and magnetization areas having perpendicular magnetization direction in a second direction to provide multiple Hall-resistance states.8. The SOT device of claim 7 , wherein the perpendicular magnetization direction ...

THIN MAGNETIC FILM, METHOD OF MANUFACTURING THE SAME, AND HIGH FREQUENCY OSCILLATOR, MAGNETIC HEAD, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS USING THIN MAGNETIC FILM

According to one embodiment, there is provided a thin magnetic film having a negative anisotropy of −6×10erg/cmor less and including, on at least a nonmagnetic substrate, at least one seed layer made of a metal or metal compound, a ruthenium underlayer for controlling the orientation of an immediately overlying layer, and a magnetic layer having negative anisotropy in the normal line direction perpendicular to a surface of the magnetic layer and mainly containing Co and Ir, wherein the additive element concentration of Ir in the magnetic layer is 10 (inclusive) to 45 (inclusive) at %. 1. A thin magnetic film comprising:a nonmagnetic substrate;a ruthenium underlayer formed on the nonmagnetic substrate; and{'sup': 6', '7', '3', '8', '9', '3, 'sub': 1-x', 'x, 'a magnetic layer formed in contact with the ruthenium underlayer, having a negative anisotropy of −6×10to −1.2×10erg/cm(−6×10to −1.2×10nJ/cm) in a normal line direction perpendicular to a surface of the magnetic layer, and mainly containing CoIr(x=10 to 45 at %).'}2. The film according to claim 1 , wherein the ruthenium underlayer is annealed at a temperature of 400° C. (inclusive) to 650° C. (exclusive).3. The film according to claim 1 , further comprising claim 1 , between the nonmagnetic substrate and the ruthenium underlayer claim 1 , a seed layer made of at least one material selected from the group consisting of tantalum claim 1 , platinum claim 1 , titanium claim 1 , and nickel.4. A thin magnetic film manufacturing method comprising:forming a ruthenium underlayer on a nonmagnetic substrate;annealing the ruthenium underlayer at a temperature of 400° C. (inclusive) to 650° C. (exclusive); and{'sub': 1-x', 'x, 'forming a magnetic layer mainly containing CoIr(x=10 to 45 at %), in contact with the annealed ruthenium underlayer.'}5. The method according to claim 4 , further comprising claim 4 , before the forming the ruthenium underlayer on the nonmagnetic substrate claim 4 , forming a seed layer made of at ...

APPARATUS HAVING SELF-HEALING CURRENT-PERPENDICULAR-TO-PLANE READ HEAD

An apparatus according to one embodiment includes a substrate having a media bearing surface, and a first shield above the substrate. The first shield has a media facing side recessed from a plane extending along the media bearing surface of the substrate. A current-perpendicular-to-plane sensor is located above the substrate, the sensor having a media facing side recessed from the plane extending along the media bearing surface of the substrate. An electrically nonconductive first film is positioned on the media facing sides of the first shield and sensor. A second film is positioned on a media facing side of the first film, the second film comprising a refractory metal. 1. An apparatus , comprising:a substrate having a media bearing surface;a first shield above the substrate, the first shield having a media facing side recessed from a plane extending along the media bearing surface of the substrate;a current-perpendicular-to-plane sensor above the substrate, the sensor having a media facing side recessed from the plane extending along the media bearing surface of the substrate;an electrically nonconductive first film on the media facing sides of the first shield and sensor; anda second film on a media facing side of the first film, the second film comprising a refractory metal.2. An apparatus as recited in claim 1 , wherein the first film is a seed layer for the second film claim 1 , the second film being directly on the first film.3. An apparatus as recited in claim 1 , wherein the first film comprises silicon.4. An apparatus as recited in claim 1 , wherein the first film comprises silicon nitride.5. An apparatus as recited in claim 8 , wherein the first film comprises silicon nitride.6. An apparatus as recited in claim 1 , wherein the second film is electrically conductive.7. An apparatus as recited in claim 1 , wherein the second film comprises titanium.8. An apparatus as recited in claim 1 , wherein the second film is a titanium alloy comprising at least 70 at ...

SWITCHING PERIOD CONTROL OF MICROWAVE ASSISTED MAGNETIC RECORDING FOR POLE ERASURE SUPPRESSION

A magnetic recording system for preventing data loss resulting magnetic oscillator current. The magnetic recording system includes a magnetic write head with a magnetic write pole, a magnetic oscillator near the magnetic write pole, and a write coil for magnetizing the write pole. Circuitry is connected with the magnetic write coil to supply a current to the write coil and connected with the magnetic oscillator to supply a current to the magnetic oscillator. The circuitry is configured to ensure that the current to the magnetic oscillator does not inadvertently magnetize the write pole after the magnetic write pole has demagnetized. 1. A magnetic recording system , comprising:a magnetic write pole;a magnetic oscillator adjacent to the magnetic write pole, wherein the magnetic oscillator is configured to generate an oscillating magnetic field; andcircuitry connected to the magnetic oscillator to induce a direct current through the magnetic oscillator during operation of the magnetic oscillator and an alternating current through the magnetic oscillator for a predetermined period upon deactivation of the magnetic oscillator.2. The magnetic recording system of claim 1 , wherein the circuitry comprises:a first transistor and second transistor connected to a first input; anda third transistor and fourth transistor connected to a second input;wherein the first transistor, the second transistor, the third transistor, and the fourth transistor are selectively activated and deactivated by a control signal to output either the direct current or the alternating current.3. The magnetic recording system of claim 2 , wherein the control signal comprises a first control signal connected to the first transistor and the fourth transistor and a second control signal connected to the second transistor and the third transistor.4. The magnetic recording system of claim 3 , wherein the first control signal is connected to a base terminal of the first transistor and a base terminal of the ...

Spin Injection Assisted Magnetic Recording

A spin injection assisted magnetic recording structure is disclosed wherein a ferromagnetic (FM) layer and at least one spin preservation (SP) layer are formed between a main pole (MP) trailing side and a write shield (WS). Current (Ia) flows between the MP and WS, or is injected into the FM layer. As a result, the spin polarized electrons from the FM layer, which flow across one or two SP layers to generate a magnetization that enhances one or both of a local WS magnetization and return field, and a local MP magnetization and write field, respectively. A lead to the FM layer may be stitched to enable lower resistance and improve reliability. The FM layer may be recessed from the ABS to allow more overlap with the SP layer for lower current density while maintaining performance. Higher linear density and area density capability, and better reliability are achieved. 1. A spin injection assisted magnetic recording (SIAMR) structure , comprising:(a) a main pole (MP) that is configured to generate a magnetic (write) field which is directed orthogonal to an air bearing surface (ABS) and through a MP tip at the ABS;(b) a write shield (WS) with a side at the ABS through which a return field passes orthogonal to the ABS, and having a bottom surface that faces a MP trailing side; and{'claim-text': ['(1) a ferromagnetic (FM) layer having a magnetization substantially in a direction of a WG field flux between the MP and WS;', '(2) a spin preservation (SP) layer that adjoins a first side of the FM layer, and is either the first layer that conducts spin polarized current from the FM layer into the WS at the WS bottom surface, or is the second layer that conducts spin polarized current from the FM layer into the MP trailing side, and wherein the SIAMR stack of layers is configured so that when a current (Ia) is injected from a source into the FM layer, spin polarized electrons flow across the SP layer to generate a magnetization proximate to the MP trailing side that enhances a ...

Magnetic head and disk device having the same

A magnetic head includes a main magnetic pole, a write shield separated from the main magnetic pole by a write gap, a first side shield that is separated from the main magnetic pole by a first side gap, a second side shield that is separated from the main magnetic pole by a second side gap, a first layer that has a first magnetic relative permeability and is disposed in the write gap between the main magnetic pole and the write shield, and a second layer that has a second magnetic relative permeability and is disposed in the first side gap and the second side gap, wherein the first magnetic relative permeability is smaller than the second magnetic relative permeability.

CURRENT PERPENDICULAR-TO-PLANE SENSORS HAVING HARD SPACERS

A tape drive, according to one embodiment, includes: a magnetic head, a drive mechanism for passing a magnetic medium over the magnetic head, and a controller electrically coupled to the magnetic head. The magnetic head further includes a transducer structure having: a lower shield, a current-perpendicular-to-plane sensor above the lower shield, an electrical lead layer between the sensor and the lower shield, and a spacer layer between the electrical lead layer and the lower shield. A conductivity of the electrical lead layer is higher than a conductivity of the spacer layer. Moreover, the electrical lead layer is in electrical communication with the sensor. 1. A tape drive , comprising:a magnetic head;a drive mechanism for passing a magnetic medium over the magnetic head; anda controller electrically coupled to the magnetic head, a lower shield;', 'a current-perpendicular-to-plane sensor above the lower shield;', 'an electrical lead layer between the sensor and the lower shield, wherein the electrical lead layer is in electrical communication with the sensor; and', 'a spacer layer between the electrical lead layer and the lower shield,', 'wherein a conductivity of the electrical lead layer is higher than a conductivity of the spacer layer., 'wherein the magnetic head includes a transducer structure having2. The tape drive as recited in claim 1 , comprising a second electrical lead layer present between the sensor and an upper shield claim 1 , wherein a second spacer layer is present between the upper shield and the second electrical lead layer.3. The tape drive as recited in claim 1 , wherein the spacer layer includes at least one material selected from a group consisting of: aluminum oxide claim 1 , chrome oxide claim 1 , silicon nitride claim 1 , boron nitride claim 1 , silicon carbide claim 1 , silicon oxide claim 1 , titanium oxide claim 1 , and titanium nitride.4. The tape drive as recited in claim 1 , wherein the spacer layer includes an aluminum oxide ...

SPIN TORQUE OSCILLATOR, METHOD OF MANUFACTURING THE SAME, MAGNETIC RECORDING HEAD, MAGNETIC HEAD ASSEMBLY, AND MAGNETIC RECORDING APPARATUS

According to one embodiment, there is provided a spin torque oscillator including an oscillation layer formed of a magnetic material, a spin injection layer formed of a magnetic material and configured to inject a spin into the oscillation layer, and a current confinement layer including an insulating portion formed of an oxide or a nitride and a conductive portion formed of a nonmagnetic metal and penetrating the insulating portion in a direction of stacking. The conductive portion of the current confinement layer is positioned near a central portion of a plane of a device region including the oscillation layer and the spin injection layer. 1. A method of manufacturing a spin torque oscillator , the method comprising:forming a metal layer to be converted into a current confinement layer on a stack including an oscillation layer comprising a magnetic material and a spin injection layer comprising a magnetic material;forming, on the metal layer, a mask layer with a tapered surface at an end thereof; andoxidizing or nitriding an end of the metal layer located under the mask layer formed to include the tapered surface at the end thereof, to form a current confinement layer comprising an insulating portion comprising an oxide or a nitride and a conductive portion comprising a nonmagnetic metal and penetrating the insulating portion in a direction of stacking.2. The method of claim 1 , wherein the conductive portion of the current confinement layer has a rectangular planar shape claim 1 , and a device region including the oscillation layer and the spin injection layer has a rectangular planar shape in a size of 50 nm×50 nm or less claim 1 , and the conductive portion of the current confinement layer is positioned near a central portion of a plane of the device region including the oscillation layer and the spin injection layer claim 1 , and the insulating portion is between each of three sides of the conductive portion and a corresponding one of four sides of the device ...

Spin Injection Assisted Magnetic Recording

A spin injection assisted magnetic recording structure is disclosed wherein a ferromagnetic (FM) layer and at least one spin preservation (SP) layer are formed between a main pole (MP) trailing side and a write shield (WS). Current (Ia) flows between the MP and WS, or is injected into the FM layer. As a result, the spin polarized electrons from the FM layer, which flow across one or two SP layers to generate a magnetization that enhances one or both of a local WS magnetization and return field, and a local MP magnetization and write field, respectively. A lead to the FM layer may be stitched to enable lower resistance and improve reliability. The FM layer may be recessed from the ABS to allow more overlap with the SP layer for lower current density while maintaining performance. Higher linear density and area density capability, and better reliability are achieved. 1. A spin injection assisted magnetic recording (SIAMR) structure , comprising:(a) a main pole (MP) that is configured to generate a magnetic (write) field which is directed orthogonal to an air bearing surface (ABS) and through a MP tip at the ABS;(b) a write shield (WS) with a side at the ABS through which a return field passes orthogonal to the ABS, and having a bottom surface that faces a MP trailing side; and (1) a ferromagnetic (FM) layer having a magnetization substantially in a direction of a WG field flux between the MP and WS;', '(2) a spin preservation (SP) layer that adjoins a first side of the FM layer, and is either the first layer that conducts spin polarized current from the FM layer into the WS at the WS bottom surface, or is the second layer that conducts spin polarized current from the FM layer into the MP trailing side, and wherein the SIAMR stack of layers is configured so that when a current (Ia) is injected from a source into the FM layer through a lead that excludes the MP and TS, spin polarized electrons flow across the SP layer to generate a magnetization proximate to the MP ...

MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE

According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a first magnetic layer provided between the magnetic pole and the first shield, a second magnetic layer provided between the first magnetic layer and the first shield, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The intermediate layer is nonmagnetic. A first distance between the magnetic pole and the first magnetic layer along a first direction is not less than 1% and not more than 10% of a second distance between the magnetic pole and the first shield along the first direction. The first direction is from the first magnetic layer toward the second magnetic layer. 1. A magnetic recording device , comprising:a magnetic head; anda magnetic recording medium, information being recorded in the magnetic recording medium by the magnetic head, a magnetic pole;', 'a first shield;', 'a first magnetic layer provided between the magnetic pole and the first shield;', 'a second magnetic layer provided between the first magnetic layer and the first shield; and', 'an intermediate layer provided between the first magnetic layer and the second magnetic layer, the intermediate layer being nonmagnetic,', 'a first distance between the magnetic pole and the first magnetic layer along a first direction being not less than 1% and not more than 10% of a second distance between the magnetic pole and the first shield along the first direction, the first direction being from the first magnetic layer toward the second magnetic layer,, 'wherein the magnetic head compriseswherein a shortest bit length of the magnetic recording medium is not less than 0.5 times and not more than 0.78 times a third distance between the first magnetic layer and the first shield along the first direction.2. The magnetic device according to claim 1 , wherein the first distance is not less than 1 nm and not more than 4 nm.3. The magnetic device according to claim 1 , further ...

MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE

According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a first magnetic layer, a second magnetic layer, a third magnetic layer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a fourth intermediate layer. The first magnetic layer is provided between the magnetic pole and the first shield. The second magnetic layer is provided between the first magnetic layer and the first shield. The third magnetic layer is provided between the second magnetic layer and the first shield. The first intermediate layer is provided between the magnetic pole and the first magnetic layer. The second intermediate layer is provided between the first magnetic layer and the second magnetic layer. The third intermediate layer is provided between the second magnetic layer and the third magnetic layer. The fourth intermediate layer is provided between the third magnetic layer and the first shield. 1. A magnetic head , comprising:a magnetic pole;a first shield;a first magnetic layer provided between the magnetic pole and the first shield;a second magnetic layer provided between the first magnetic layer and the first shield;a third magnetic layer provided between the second magnetic layer and the first shield;a first intermediate layer provided between the magnetic pole and the first magnetic layer, the first intermediate layer including at least one selected from a first group consisting of Au, Cu, Ag, Al, and Ti;a second intermediate layer provided between the first magnetic layer and the second magnetic layer, the second intermediate layer including at least one selected from a second group consisting of Ta, Ir, W, Mo, Cr, Tb, Rh, and Pd;a third intermediate layer including at least one selected from the first group and being provided between the second magnetic layer and the third magnetic layer; anda fourth intermediate layer including at least one selected from the second group and being provided between the third ...

Magnetic Recording Devices Using Virtual Side Shields for Improved Areal Density Capability

Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.

Alternative Designs for Magnetic Recording Assisted by a Single Spin Hall Effect (SHE) Layer in the Write Gap

A Spin Hall Effect (SHE) assisted magnetic recording device is disclosed wherein a SHE layer comprising a giant Spin Hall Angle material is formed in a write gap between a main pole (MP) trailing side and trailing shield (TS). The SHE layer contacts either the MP or TS, and has a front side at the air bearing surface or recessed therefrom. In one embodiment, a current (I 1 ) is applied between the MP trailing side and SHE layer and is spin polarized to generate a first spin transfer torque that tilts a local MP magnetization to a direction that enhances a MP write field. In a second embodiment, a current (I 2 ) is applied between the SHE layer and TS and is spin polarized to generate a second spin transfer torque that tilts a local TS magnetization to a direction that increases the TS return field and improves bit error rate.

Writer with protruded section at trailing edge

A writer includes a leading edge, a trailing edge, a longitudinal axis defined between the leading and trailing edges, and a transverse axis orthogonal to the longitudinal axis. A writer region is provided at a protruded section of the trailing edge oriented along the longitudinal axis. A write pole is arranged at the protruded section to write data to two locations spaced apart from one another relative to the transverse axis for a range of skew angles.

MAGNETIC RECORDING HEAD AND DISK DEVICE HAVING THE SAME

A magnetic recording head includes a main magnetic pole extending to an air bearing surface of the magnetic recording head and having an end portion that is exposed at the air bearing surface, a magnetic shield having an end portion that is exposed at the air bearing surface and faces the end portion of the main magnetic pole with a gap therebetween, a stacked-layer element disposed in the gap, and including a first conductive layer in contact the main magnetic pole, a second conductive layer in contact with the magnetic shield, and an magnetic permeability adjusting layer disposed between the first conductive layer and the second conductive layer, and first and second terminals between which a current flows through the main magnetic pole, the stacked-layer element, and the magnetic shield when the current is supplied to one of the terminals. 14.-. (canceled)5. A magnetic recording head comprising:a main magnetic pole extending to an air bearing surface of the magnetic recording head and having an end portion that is exposed at the air bearing surface;a magnetic shield having an end portion that is exposed at the air bearing surface and faces the end portion of the main magnetic pole with a gap therebetween;a stacked-layer element disposed in the gap, and including a first conductive layer in contact with the end portion of the main magnetic pole, a second conductive layer in contact with the end portion of the magnetic shield, and a magnetic permeability adjusting layer formed of a magnetic material containing at least one of iron, cobalt, and nickel and disposed between the first conductive layer and the second conductive layer; andfirst and second terminals between which a current flows through the main magnetic pole, the stacked-layer element, and the magnetic shield when the current is supplied to one of the terminals,wherein a distance between the stacked-layer element and the air bearing surface is greater than 2 nm.6. The magnetic recording head according to ...

Perpendicular Magnetic Recording (PMR) Writer with Hybrid Shield Layers

A method is disclosed for forming a perpendicular magnetic recording writer with an all wrap around (AWA) shield design wherein one or more of the leading shield, trailing shield, and side shields are a composite wherein a magnetic “hot seed” layer made of a >19 kG to 24 kG material adjoins a gap layer, and a side of the hot seed layer opposite the gap layer adjoins a high damping magnetic layer made of a 10-16 kG material (or a 16-19 kG material in the trailing shield) having a Gilbert damping parameter α>0.04. In one embodiment, the high damping magnetic layer is FeNiRe with a Re content of 3 to 15 atomic %. The main pole leading and trailing sides may be tapered. Side shields may have a single taper or dual taper structure. Higher writer speed with greater areal density capability is achieved. 1. A method of forming an all wrap around (AWA) shield structure in a perpendicular magnetic recording (PMR) writer , comprising:(a) providing a 10-16 kG leading shield layer with a top surface;(b) forming a 10-16 kG magnetic layer with a first opening formed therein, the first opening exposes a portion of the leading shield layer top surface;(c) sequentially depositing a high damping (HD) magnetic layer made of a 10-16 kG material with a Gilbert damping parameter α>0.04, a hot seed layer made of a >19 to 24 kG material; and a gap layer in the first opening, a bottom surface of the gap layer is formed along a first plane that is orthogonal to a center plane that bisects a subsequently deposited main pole;(d) forming a first photoresist layer on the gap layer with a second opening therein, the second opening exposes a portion of the first opening;(e) depositing the main pole to fill the first and second openings;(f) performing a chemical mechanical polish (CMP) process to form top surfaces of the gap layer; main pole, HD magnetic layer, hot seed layer, and 10-16 kG magnetic layer at a second plane that is parallel to the first plane, the gap layer comprises a leading gap ...

Perpendicular Magnetic Recording (PMR) Writer with Hybrid Shield Layers

A perpendicular magnetic recording writer with an all wrap around (AWA) shield design wherein one or more of the leading shield, trailing shield, and side shields comprises a magnetic “hot seed” layer made of a >19 kG to 24 kG material that adjoins a gap layer, and a side of the hot seed layer opposite the gap layer adjoins a high damping magnetic layer made of a 10-16 kG material (or a 16-19 kG material in the trailing shield) having a Gilbert damping parameter α>0.04. In one embodiment, the high damping magnetic layer is FeNiRe with a Re content of 3 to 15 atomic %. The main pole leading and trailing sides may be tapered. Side shields may have a single taper or dual taper structure. Higher writer speed with greater areal density capability is achieved. 1. A perpendicular magnetic recording (PMR) writer , comprising:(a) a main pole with a leading side and a trailing side, the leading side adjoins a lead gap at an air bearing surface (ABS) and the trailing side adjoins a write gap at the ABS;(b) a gap layer surrounding the main pole, the gap layer includes the lead gap, the write gap, and a side gap which contacts a side of the main pole formed between the trailing side and leading side on each side of a center plane that bisects the main pole in a direction orthogonal to the ABS; and(c) an all wrap around (AWA) shield structure wherein one or more of a leading shield, side shields, and trailing shield have a composite structure, comprising:(1) a hot seed layer made of a >19 to 24 kG material having a first side that faces the main pole and adjoins the gap layer, and a second side that is opposite the first side; and(2) a high damping (HD) magnetic layer made of a 10-16 kG material in the side shields and leading shield, and a 16-19 kG material in the trailing shield, the HD magnetic layer has a Gilbert damping parameter α>0.04 and a first side that adjoins the second side of the hot seed layer.2. The PMR writer of wherein the trailing shield has the composite ...

MAGNETIC RECORDING DEVICE

According to one embodiment, a magnetic recording device includes a magnetic recording medium and a magnetic head. The magnetic head includes a magnetic pole and a trailing shield. The magnetic pole has a medium-opposing surface opposing the magnetic recording medium. The medium-opposing surface has a magnetic pole length along a first direction. The first direction is from the magnetic pole toward the trailing shield. The magnetic pole length is shorter than a track pitch of the magnetic recording medium. 1. A magnetic recording device , comprising:a magnetic recording medium; anda magnetic head, the magnetic head including a magnetic pole and a trailing shield, the magnetic pole having a medium-opposing surface opposing the magnetic recording medium,the medium-opposing surface having a magnetic pole length along a first direction, the first direction being from the magnetic pole toward the trailing shield,the magnetic pole length being shorter than a track pitch of the magnetic recording medium.2. The device according to claim 1 , wherein the magnetic pole length is not more than 0.7 times the track pitch.3. The device according to claim 1 , wherein a bevel angle of the magnetic pole is less than a maximum value of an absolute value of a skew angle of the magnetic recording medium.4. The device according to claim 3 , wherein the bevel angle is not more than 0.5 times the maximum value.5. The device according to claim 3 , wherein the bevel angle is not less than 0 degrees and not more than 17 degrees.6. The device according to claim 3 , wherein the maximum value is 20 degrees or less.7. The device according to claim 1 , further comprising an arm claim 1 ,the arm including an arm axis and an extension portion, the extension portion extending along an arm extension direction and rotating with the arm axis as a center,the magnetic pole being fixed to the extension portion,the magnetic recording medium rotating with a medium rotation axis as a center,a direction of the ...

MAGNETIC DISK DEVICE

According to one embodiment, a magnetic disk device includes a magnetic disk, a recording head and a controller. The recording head includes a high-frequency oscillator disposed in a write gap between a main magnetic pole and a return magnetic pole and configured to oscillate in accordance with a bias voltage, and a bias voltage supply circuit configured to supply the bias voltage to the high-frequency oscillator. The controller includes a bias voltage controller configured to control the bias voltage to be applied to the high-frequency oscillator in accordance with a sampling frequency of data when the data is recorded on the magnetic disk by the recording head. 1. A magnetic disk device , comprising:a magnetic disk including a recording layer;a recording head configured to apply a recording magnetic field to the recording layer by a main magnetic pole and a return magnetic pole; anda controller configured to control the recording head,whereinthe recording head includes:a high-frequency oscillator disposed in a write gap between the main magnetic pole and the return magnetic pole and configured to oscillate in accordance with a bias voltage; anda bias voltage supply circuit configured to supply the bias voltage to the high-frequency oscillator, andthe controller includes a bias voltage controller configured to control the bias voltage to he applied to the high-frequency oscillator in accordance with a sampling frequency of data when the data is recorded on the magnetic disk by the recording head.2. The magnetic disk device of claim 1 , whereinthe recording head comprises a protective film covering a surface opposite to the magnetic disk including the high-frequency oscillator, andthe bias voltage controller controls the bias voltage to lower relative to a reference bias as the sampling frequency becomes lower.3. The magnetic disk device of claim 2 , whereinthe bias voltage controller controls the bias voltage to lower relative to a reference bias or turn off when ...

MAGNETIC HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE

According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a second shield, a first stacked body and a second stacked body. At least a portion of the magnetic pole is provided between the first and second shields. The first stacked body is provided between the magnetic pole and the first shield. The second stacked body is provided between the magnetic pole and the second shield. The first stacked body includes a first magnetic layer including, a first conductive layer provided between the magnetic pole and the first magnetic layer, and a second conductive layer provided between the first magnetic layer and the first shield. The second stacked body includes a second magnetic layer including, a third conductive layer provided between the magnetic pole and the second magnetic layer, and a fourth conductive layer provided between the second magnetic layer and the second shield. 1. A magnetic head , comprising:a magnetic pole;a first shield;a second shield, at least a portion of the magnetic pole being provided between the first shield and the second shield;a first stacked body provided between the magnetic pole and the first shield; anda second stacked body provided between the magnetic pole and the second shield, a first magnetic layer including at least one selected from the group consisting of Fe, Co, and Ni,', 'a first conductive layer provided between the magnetic pole and the first magnetic layer, and', 'a second conductive layer provided between the first magnetic layer and the first shield,, 'the first stacked body including'} a second magnetic layer including at least one selected from the group consisting of Fe, Co, and Ni,', 'a third conductive layer provided between the magnetic pole and the second magnetic layer, and', 'a fourth conductive layer provided between the second magnetic layer and the second shield., 'the second stacked body including'}2. The head according to claim 1 , further comprising:a first terminal electrically ...

SPIN ORBITAL TORQUE BASED MICROWAVE ASSISTED MAGNETIC RECORDING WITH DUAL SPIN HALL LAYERS OR WRAP AROUND SPIN HALL LAYER

A magnetic recording head includes a trailing shield and a main pole. A trailing shield gap is between the trailing shield and the main pole. A spin orbital torque structure is within the trailing shield gap. The spin orbital torque structure includes a spin torque layer having a first side and a second side at a media facing surface. A first spin Hall layer is along the first side of the spin torque layer. A second spin Hall layer is along the second side of the spin torque layer. The first spin Hall layer comprises a heavy metal material having a positive spin Hall angle. The second spin Hall layer comprises a heavy metal material having a negative spin Hall angle. 1. A magnetic recording head , comprising:a trailing shield;a main pole;a trailing shield gap between the trailing shield and the main pole;a spin torque layer within the trailing shield gap, the spin torque layer having a first side, a second side, and a third side at a media facing surface; anda spin Hall structure wrapped around the first side, the second side, and the third side of the spin torque layer.2. The magnetic recording head of claim 1 , wherein the spin Hall structure comprises:a first spin Hall layer around the first side and the second side of the media facing surface of the spin torque layer; anda second spin Hall layer around the third side of the media facing surface of the spin torque layer.3. The magnetic recording head of claim 2 , wherein the first spin Hall layer comprises a heavy metal material having a positive spin Hall angle and wherein the second spin Hall layer comprises a heavy metal material having a negative spin Hall angle.4. The magnetic recording head of claim 1 , wherein the spin Hall structure comprises an individual spin Hall layer around the first side claim 1 , the second side claim 1 , and the third side of the media facing surface of the spin torque layer.5. The magnetic recording head of claim 1 , further comprising a charge current blocking layer between the ...

MAGNETIC HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE

According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a magnetic layer, a first conductive layer, and a second conductive layer. The magnetic layer is provided between the magnetic pole and the first shield. The first conductive layer includes at least one of Cu, Ag, Au, Al and Cr, and is provided between the magnetic pole and the first shield. A direction from the first conductive layer toward the magnetic layer crosses a first direction from the magnetic pole toward the first shield. A second conductive layer includes at least one of Ta, Pt, W, Ru, Mo, Ir, Rh, and Pd and is provided at one of a first position or a second position. The first position is between the first conductive layer and the first shield. The second position is between the magnetic pole and the first conductive layer. 1. A magnetic head , comprising:a magnetic pole;a first shield;a magnetic layer provided between the magnetic pole and the first shield;a first conductive layer including at least one selected from the group consisting of Cu, Ag, Au, Al and Cr and being provided between the magnetic pole and the first shield, a direction from the first conductive layer toward the magnetic layer crossing a first direction from the magnetic pole toward the first shield; anda second conductive layer including at least one selected from the group consisting of Ta, Pt, W, Ru, Mo, Ir, Rh, and Pd and being provided at one of a first position or a second position, the first position being between the first conductive layer and the first shield, the second position being between the magnetic pole and the first conductive layer.2. The head according to claim 1 , wherein the first conductive layer contacts the magnetic layer.3. The head according to claim 1 , wherein the second conductive layer contacts the first conductive layer.4. The head according to claim 1 , wherein a current flows from the first conductive layer toward the second conductive layer.5. The head according ...

WRITE POLE FOR RECORDING HEAD

A write pole structure disclosed herein includes a write pole, a trailing shield, and a high magnetic moment (HMM) material layer on a surface of the trailing shield facing the write pole. 1. A write pole structure comprising:a write pole;a trailing shield;a high magnetic moment (HMM) material layer on a surface of the trailing shield facing the write pole; anda second HMM layer on a surface of the write pole facing the trailing shield.2. The write pole structure of claim 1 , further comprising a seed layer between the HMM layer and the surface of the trailing shield.3. The write pole structure of claim 1 , wherein the HMM is FeN.4. (canceled)5. The write pole structure of claim 1 , wherein the second HMM layer is recessed from a tip of the write pole near an air-bearing surface (ABS).6. An apparatus comprising:a write pole;a near field transducer (NFT) separated from the write pole by an NFT to pole spacer (NPS) layer; anda high magnetic moment (HMM) layer between the write pole and the NPS layer.7. The apparatus of wherein the HMM layer is FeN.8. The apparatus of further comprising a seed layer between the NPS layer and the HMM layer.9. The apparatus of wherein the seed layer is made of at least one of MgO claim 6 , YO claim 6 , BeO claim 6 , Fe claim 6 , Ag claim 6 , Cr claim 6 , and ZrN.10. The apparatus of wherein the HMM layer comprises a multilayer structure claim 6 , each layer of the multilayer structure comprising an HMM layer and a seed layer.11. The apparatus of wherein the HMM layer has a thickness between 5 nm and 20 nm.12. A magnetic recording head comprising:a write pole structure having high magnetic moment (HMM) material having magnetic moment higher than 2.45 Tesla, wherein the HMM material is on a trailing edge of the write pole.13. The magnetic recording head of wherein the HMM material is FeN.14. The magnetic recording head of wherein the HMM material is on a trailing shield of the write pole structure.15. The magnetic recording head of further ...

Writer with Narrower High Moment Trailing Shield

A PMR (perpendicular magnetic recording) write head configured for microwave assisted magnetic recording (MAMR) in the form of spin assisted writing (SAW) or spin torque oscillation (STO) includes a spin-torque oscillator (STO) or SAW device and trailing shield formed of high moment magnetic material (HMTS). By patterning the STO or SAW and the HMTS in a simultaneous process the HMTS and the STO or SAW layers are precisely aligned and have very similar cross-track widths. In addition, the write gap at an off-center location has a thickness that is independent from its center-track thickness and the write gap total width can have a flexible range whose minimum value is the same width as the STO or SAW width. 1. A perpendicular magnetic writer (PMR) configured for microwave assisted magnetic recording (MAMR) , comprising:a magnetic main pole (MP) emerging at an air-bearing surface (ABS) and having a trapezoidal ABS face that is wider at a trailing edge surface than at a leading-edge surface and wherein said trailing and leading-edge surfaces are connected by symmetrically formed side edge surfaces;a dielectric layer conformally surrounding said MP and forming a uniform gap between both side edge surfaces of said MP and said leading edge surface of said MP; whereinsaid dielectric layer has an upper planar surface that is coplanar with said trailing edge surface of said MP and that extends symmetrically away from said MP from said uniform gaps;a spin-assisted writing device (SAW) formed on the trailing edge side of said MP and having the same width as said trailing edge side and aligned with it; whereinsaid SAW is configured to provide a magnetization against the direction of a gap field and, thereby, enhance the magnetic field of said MP when said magnetic field is impinging on a recording media;a high-moment trailing shield (HMTS) formed on said SAW layer and having the same width of said SAW layer and aligned with it;a write gap (WG) layer formed on said upper planar ...

A READER STRUCTURE

A reader structure, a method of biasing a free layer of a reader structure, and a read head are provided, the reader structure comprises a free layer having a reader edge for interacting with and being proximal to a magnetic media; a first magnetic bias member and a second magnetic bias member each provided adjacent to the free layer, the first and second magnetic bias members being configured to have a first magnetisation direction which is substantially parallel to the reader edge; an additional bias member disposed adjacent to the free layer, the additional bias member further being located proximal to at least one of the first magnetic bias member and the second magnetic bias member, and the additional bias member being configured to have a magnetisation direction that is substantially orthogonal to the first magnetisation direction. 1. A reader structure comprising ,a free layer having a reader edge for interacting with and being proximal to a magnetic media;a first magnetic bias member and a second magnetic bias member each provided adjacent to the free layer, the first and second magnetic bias members being configured to have a first magnetisation direction which is substantially parallel to the reader edge;an additional bias member disposed adjacent to the free layer, the additional bias member further being located proximal to at least one of the first magnetic bias member and the second magnetic bias member, and the additional bias member being configured to have a magnetisation direction that is substantially orthogonal to the first magnetisation direction.2. The reader structure according to claim 1 , comprising the additional bias member being in the form of a dual-polarity bias member that comprises at least a third magnetic bias component and a fourth magnetic bias component claim 1 , the third magnetic bias component being located proximal to the first magnetic bias member and the fourth magnetic bias component being located proximal to the second ...

MAGNETIC HEAD, DISK DRIVE WITH THE SAME AND METHOD OF MANUFACTURING MAGNETIC HEAD

According to one embodiment, a magnetic head includes an air bearing surface, a first surface on which contact pads connected to elements are provided, a pair of second surfaces provided respectively with a connection terminal connected to the contact pad, a main pole with a distal end portion extending to the air bearing surface, a write shield opposing the distal end portion of the main pole with a write gap therebetween, and a high-frequency oscillator provided between the main pole and the write shield within the write gap and electrically connected to the main pole and the write shield. The high-frequency oscillator includes a spin injection layer and an oscillation layer, and at least the oscillation layer is recessed in a direction away from the air bearing surface. 1. A magnetic head comprising:an air bearing surface;a first surface on which contact pads including a first contact pad and a second contact pad connected to elements are provided;a pair of second surfaces provided respectively with a pair of connection terminals connected respectively to the first and second contact pads to supply electricity to the elements;a main pole configured to produce a magnetic field for recording and comprising a distal end portion extending to the air bearing surface;a write shield opposing the distal end portion of the main pole with a write gap therebetween; anda high-frequency oscillator provided between the main pole and the write shield within the write gap and electrically connected to the main pole and the write shield, the high-frequency oscillator comprising a spin injection layer and an oscillation layer stacked one on another, and at least the oscillation layer being recessed in a direction away from the air bearing surface with respect to the main pole and the write shield.2. The magnetic head of claim 1 , wherein the write gap is formed to be 30 nm or less claim 1 , and the oscillation layer is recessed by 1 nm or more.3. The magnetic head of claim 2 , ...

CURRENT-PERPENDICULAR-TO-PLANE MAGNETO-RESISTANCE EFFECT ELEMENT

The CPPGMR element of the present invention has an orientation layer formed on a substrate to texture a Heusler alloy into a (100) direction, an underlying layer that is an electrode for magneto-resistance measurement stacked on the orientation layer a lower ferromagnetic layer and an upper ferromagnetic layer each stacked on the underlying layer and made of a Heusler alloy, a spacer layer sandwiched between the lower ferromagnetic layers and the upper ferromagnetic layers and a cap layer stacked on the upper ferromagnetic layer for surface-protection. This manner makes it possible to provide, inexpensively, an element using a current-perpendicular-to-plane giant magneto-resistance effect (CPPGMR) of a thin film having a trilayered structure of a ferromagnetic metal/a nonmagnetic metal/a ferromagnetic metal, thereby showing excellent performances. 1. A current-perpendicular-to-plane magneto-resistance effect element , comprising:a substrate comprising at least one of a surface-oxidized Si substrate, a silicon substrate, a glass substrate, and a metal substrate;an orientation layer formed on the substrate to texture Heusler alloy into a (100) direction;a lower ferromagnetic layer and an upper ferromagnetic layer that each comprises a polycrystalline thin film of a Heusler alloy textured into a (100) direction, and that are each formed on the orientation layer; anda spacer layer sandwiched between the lower ferromagnetic layer and the upper ferromagnetic layer,.wherein the orientation layer comprises at least one of MgO, TiN, and NiTa alloys,thereby improving a variation of the electric resistance per unit area of the element, compared with that of a (110) textured polycrystalline element not using an orientation layer.23-. (canceled)4. The current-perpendicular-to-plane magneto-resistance effect element according to claim 1 , wherein the spacer layer is at least one metal selected from the group consisting of Ag claim 1 , Al claim 1 , Cu claim 1 , Au claim 1 , and Cr ...

MAGNETIC RECORDING DEVICE

According to one embodiment, a magnetic recording device includes a magnetic head, a first electrical circuit, and a second electrical circuit. The magnetic head includes a magnetic pole, a first shield, a conductive member electrically connecting the magnetic pole and the first shield and being provided between the magnetic pole and the first shield, and a coil. The first electrical circuit is configured to supply a first current to the magnetic pole, the conductive member, and the first shield. The second electrical circuit is configured to supply a recording current to the coil. A recording magnetic field is generated from the magnetic pole. The recording magnetic field corresponds to the recording current. A rise time of the recording current is not less than 65% of a shortest bit length. 1. A magnetic recording device , comprising: a magnetic pole,', 'a first shield,', 'a conductive member electrically connecting the magnetic pole and the first shield and being provided between the magnetic pole and the first shield, and', 'a coil;, 'a magnetic head including'}a first electrical circuit configured to supply a first current to the magnetic pole, the conductive member, and the first shield; anda second electrical circuit configured to supply a recording current to the coil,a recording magnetic field being generated from the magnetic pole, the recording magnetic field corresponding to the recording current, anda rise time of the recording current being not less than 65% of a shortest bit length.2. The device according to claim 1 , wherein a magnetic layer;', 'a first conductive layer contacting the magnetic pole and the magnetic layer, being provided between the magnetic pole and the magnetic layer, including one of a first material or a second material, and being nonmagnetic; and', 'a second conductive layer contacting the magnetic layer and the first shield, being provided between the magnetic layer and the first shield, including the other of the first material ...

MAGNETIC HEAD FOR PERPENDICULAR RECORDING HAVING A PLURALITY OF MAGNETIC PATH PORTIONS

A magnetic head includes a coil, a main pole, a write shield, and a return path section. The return path section includes a yoke layer located on the front side in the direction of travel of a recording medium relative to the main pole, and a coupling part coupling the main pole and the yoke layer to each other. The coupling part includes a plurality of magnetic path portions that separate a magnetic flux into a plurality of fluxes and allow the fluxes to pass therethrough in parallel. The coil includes a plurality of winding portions disposed around the plurality of magnetic path portions, respectively. 1. A magnetic head for perpendicular magnetic recording , comprising:a medium facing surface facing a recording medium;a coil producing a magnetic field corresponding to data to be written on the recording medium;a main pole having an end face located in the medium facing surface, the main pole allowing a magnetic flux that corresponds to the magnetic field produced by the coil to pass, and producing a write magnetic field for writing the data on the recording medium by means of a perpendicular magnetic recording system;a write shield made of a magnetic material and having an end face located in the medium facing surface;a gap part made of a nonmagnetic material and interposed between the main pole and the write shield; anda return path section made of a magnetic material and connecting the write shield and part of the main pole away from the medium facing surface to each other, whereinthe end face of the write shield includes a first end face portion located on a front side in a direction of travel of the recording medium relative to the end face of the main pole,the return path section includes a first yoke layer located on the front side in the direction of travel of the recording medium relative to the main pole, and a first coupling part coupling the main pole and the first yoke layer to each other,the first coupling part includes a plurality of magnetic path ...

MAMR HEAD WITH A MULTI-LAYERED SIDE GAP FOR STABLE OSCILLATION OF THE STO

A microwave-assisted magnetic recording (MAMR) head according to one embodiment includes a main pole; a trailing shield positioned downstream from the main pole; an oscillation device adapted to generate a high-frequency magnetic field, the oscillation device being positioned between the main pole and the trailing shield; a circuit adapted to flow an electric current therethrough to the main pole, the oscillation device, and the trailing shield; an electrically conductive non-magnetic body positioned on one or more sides of the main pole in a cross-track direction and/or a leading direction; and an insulating non-magnetic body positioned on one or more sides of the electrically conductive non-magnetic body in the cross-track direction and/or the leading direction, wherein one or more edge portions of one side of the oscillation device and one or more edge portions of one side of the main pole are in direct contact with the electrically conductive non-magnetic body. 1. A microwave-assisted magnetic recording (MAMR) head , comprising:a main pole comprising a magnetic body adapted to generate a magnetic field for recording data on a magnetic recording medium;a trailing shield positioned downstream from the main pole in a direction in which the magnetic recording medium advances;an oscillation device adapted to generate a high-frequency magnetic field, the oscillation device being positioned between the main pole and the trailing shield;a circuit adapted to flow an electric current therethrough to the main pole, the oscillation device, and the trailing shield;an electrically conductive non-magnetic body positioned on one or more sides of the main pole in a cross-track direction and/or a leading direction; andan insulating non-magnetic body positioned on one or more sides of the electrically conductive non-magnetic body in the cross-track direction and/or the leading direction,wherein one or more edge portions of one side of the oscillation device and one or more edge ...

Magnetic Recording Devices Having Negative Polarization Layer To Enhance Spin-Transfer Torque

Aspects of the present disclosure generally relate to a magnetic recording head of a spintronic device, such as a write head of a data storage device, for example a magnetic media drive. In one example, a magnetic recording head includes a main pole, a trailing shield, and a spin torque layer (STL) between the main pole and the trailing shield. The magnetic recording head a first layer structure on the main pole, and the first layer structure includes a negative polarization layer. The magnetic recording head also includes a second layer structure disposed on the negative polarization layer and between the negative polarization layer and the STL. The negative polarization layer is an FeCr layer. The second layer structure includes a Cr layer disposed on the FeCr layer, and a Cu layer disposed on the Cr layer and between the Cr layer and the STL. 1. A magnetic recording head , comprising:a main pole;a trailing shield;a spin torque layer (STL) disposed between the main pole and the trailing shield; and [ a first layer disposed on the STL; and', 'a second layer disposed on the first layer; and, 'a first layer structure disposed on the STL, wherein the first layer structure comprises, 'a second layer structure disposed on the first layer structure, where the second layer structure comprises a negative polarization layer., 'a multilayer structure disposed between the STL and the trailing shield, the multilayer structure comprising2. The magnetic recording head of claim 1 , further comprising a spacer layer disposed between the main pole and the STL.3. The magnetic recording head of claim 1 , wherein the second layer structure comprises a ferromagnetic layer.4. The magnetic recording head of claim 3 , wherein the ferromagnetic layer is disposed on a Cu layer.5. The magnetic recording head of claim 1 , wherein the negative polarization layer comprises one or more of Fe claim 1 , Cr claim 1 , N claim 1 , Co claim 1 , or Gd.6. The magnetic recording head of claim 1 , wherein ...