Abstract: Disclosed herein is a method for manufacturing a magneto caloric device. Magneto caloric powders are mixed with thermally conductive powders to form a composite material. An adhesive containing an acrylic resin is poured on the composite material and diffused among the composite material. The adhesive is cured within the composite material at a room temperature.

Abstract: A magnetic recording medium has recording regions including patterns of a magnetic material corresponding to servo signals and recording tracks, non-recording regions including an oxide of the magnetic material formed between the recording regions, and surface oxide films including an oxide of the magnetic material formed on surfaces of the recording regions.

Abstract: A method for producing an element including a substrate having a plurality of nanocylinders deposited thereon includes providing the substrate. The substrate is covered with a nanoporous Al2O3 membrane so as to provide a covered substrate. The covered substrate is alternately vapor-deposited, at a vapor-deposition temperatures from 250° C. to 400° C., with atoms of a magnetic element and atoms of a non-magnetic element so as to provide the plurality of nanocylinders. Each nanocylinder includes at least four superposed layers including, alternatively, the atoms of the magnetic element and the atoms of the non-magnetic element. The nanoporous Al2O3 membrane is then removed so that the nanocylinders remain on the substrate.

Abstract: A method is disclosed for the fabrication of a tunable radio frequency (RF) power output filter that includes fabricating a core body and then forming a plastically deformable metallic shell over the exterior surface of the core body.

Abstract: A method of forming a protective film for a magnetic recording medium is disclosed. The protective film suppresses cobalt elution out of the magnetic recording layer and has a thickness not larger than 3 nm. The method of the invention of forming a protective film for a magnetic recording medium comprises (1) a step of forming a protective film, on a lamination including a substrate and metallic film layers formed on the substrate, by means of a plasma CVD method using a raw gas of a hydrocarbon gas, wherein a flow rate of the hydrocarbon gas is in a range of 50 sccm to 200 sccm and a emission current is in a range of 0.1 A to 0.3 A, and (2) a step of surface treatment on the protective film that has been formed in the step (1), including sub-steps of (2a) a plasma treatment in an argon gas and (2b) a plasma treatment in a gas containing a nitrogen gas.

Abstract: Although dots and servo patterns are made of the same magnetic material, the dots have a relatively low coercive force so as to allow data deletion and rewrite by a magnetic head, while the servo patterns have a high coercive force compared with the coercive force of the dots. The coercive force of the servo patterns is strong enough so as to eliminate the influence of shape magnetic anisotropy.

Abstract: The embodiments disclose a method for fabricating high contrast stacks, including depositing materials on a substrate to form an antiferromagnetic coupling thin film layer on top of a first half of the magnetic layer of a stack, depositing a portion of a second half of the magnetic layer on top of the antiferromagnetic coupling thin film layer to couple the first and second half of the magnetic layers to the antiferromagnetic coupling thin film layer and bit-patterning a portion of the second half of the magnetic layer and the antiferromagnetic coupling thin film layer.

Abstract: A magnetic structure in one embodiment includes a tunnel barrier layer; a free layer; and a buffer layer between the tunnel barrier layer and the free layer, wherein a cross sectional area of the tunnel barrier layer in a direction parallel to a plane of deposition thereof is greater than a cross sectional area of the free layer in a direction parallel to a plane of deposition thereof, wherein a cross sectional area of the buffer layer in a direction parallel to a plane of deposition thereof is greater than a cross sectional area of the free layer in the direction parallel to the plane of deposition thereof. Additional systems and methods are also presented.

Abstract: Provided is a method for manufacturing, in a simple process, a magnetic recording medium having a distinct magnetic recording pattern formed thereon. A method for manufacturing a magnetic recording medium having a magnetically-separated magnetic recording pattern MP, the method at least including; a first step of forming a first magnetic layer 11 on a non-magnetic substrate 10; a second step of forming a resist layer 12 on the first magnetic layer 11, the resist layer 12 being patterned in correspondence with the magnetic recording pattern MP; a third step of forming a second magnetic layer 13 so as to cover a surface of the first magnetic layer 11 having the resist layer 12 formed thereon; a fourth step of removing the resist layer 12 together with the second magnetic layer 13 formed thereon; and a fifth step of partially removing the first magnetic layer 11 or partially modifying magnetic property of the first magnetic layer 11.

Abstract: According to one embodiment, a magnetic recording medium includes a substrate, an auxiliary layer formed on the substrate, and at least one perpendicular magnetic recording layer formed on the auxiliary layer. The perpendicular magnetic recording layer includes a magnetic dot pattern. The perpendicular magnetic recording layer is made of an alloy material containing one element selected from iron and cobalt, and one element selected from platinum and palladium. This alloy material has the L10 structure, and is (001)-oriented. The auxiliary layer includes a dot-like first region covered with the magnetic dot pattern, and a second region not covered with the magnetic dot pattern. The first region is made of one metal selected from (100)-oriented nickel and (100)-oriented iron. The second region contains an oxide of the metal used in the first region.

Abstract: The present invention provides a magnetic sheet with improved resistance to folding while maintaining good magnetic characteristics and reliability; a method for producing the magnetic sheet; an antenna; and a portable communication device. A magnetic sheet of the present invention includes a flat magnetic powder, and a resin binder capable of dissolving in a solvent, wherein the magnetic sheet has a gradient of the content ratio of the magnetic powder to the resin binder in a thickness direction thereof, wherein, in use, the magnetic sheet is folded so that, of the front and back surfaces thereof, one surface whose magnetic powder content is lower than that of the other is folded inward, and wherein the difference in glossiness measured at a light-incident angle of 60° between the front and back surfaces is 9.4 or more.

Abstract: Microspheres, populations of microspheres, and methods for forming microspheres are provided. One microsphere configured to exhibit fluorescent and magnetic properties includes a core microsphere and a magnetic material coupled to a surface of the core microsphere. About 50% or less of the surface of the core microsphere is covered by the magnetic material. The microsphere also includes a polymer layer surrounding the magnetic material and the core microsphere. One population of microspheres configured to exhibit fluorescent and magnetic properties includes two or more subsets of microspheres. The two or more subsets of microspheres are configured to exhibit different fluorescent and/or magnetic properties. Individual microspheres in the two or more subsets are configured as described above.

Abstract: A magnetic recording medium comprises a substrate; a heatsink layer comprising a layer of crystallized CuTi; and a hard magnetic recording layer. The crystallized CuTi is applied in an amorphous state and then crystallized through heating. The use of this heatsink improves surface and underlayer roughness compared to previous heatsink designs.

Abstract: A manufacturing method of a magnetic recording medium, the magnetic recording medium having a structure where plural magnetic recording areas and isolation areas in a magnetic recording layer are formed on a non-magnetic substrate, the isolation areas being configured to magnetically isolate the magnetic recording areas, the manufacturing method includes a step of forming the magnetic layer on the non-magnetic substrate, the magnetic layer being made of a hard magnetic material having a magnetic coercive force whereby magnetic recording is impossible; and a step of performing ion implantation partially at positions corresponding to the plural magnetic recording areas of the magnetic layer so that the magnetic recording areas are formed by reducing the magnetic coercive force in the positions of the ion implantation to a magnetic-recordable magnetic coercive force, and allowing the isolation areas to maintain the magnetic coercive force whereby magnetic recording is impossible.

Abstract: An aspect of the present invention relates to a magnetic tape comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder is a hexagonal ferrite powder, squareness in a vertical direction without demagnetizing field correction of the magnetic layer ranges from 0.6 to 1.0, and the magnetic layer further comprises a compound in which a substituent selected from the group consisting of a carboxyl group and a hydroxyl group is directly substituted into a ring structure comprising a double bond and having a ClogP falling within a range of 2.3 to 5.5.

Abstract: 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.

Abstract: A magnetic sensor having no sensitivity differences between sensitivity axes, and an easy manufacturing method therefor are provided. The method includes a process of forming first stacked films for a magnetoresistive element on a substrate. This element has a sensitivity axis in a certain direction and includes a self-pinned ferromagnetic pinned layer in which first and second ferromagnetic films are antiferromagnetically coupled through an antiparallel coupling layer, a nonmagnetic intermediate layer, and a soft magnetic free layer. The method further includes a process of removing a region of the first stacked films from the substrate. The remaining region of the films includes at least a region to be left to form the element. The method furthermore includes a process of forming second stacked films for a magnetoresistive element, which has a sensitivity axis in a direction different from the certain direction and has the same structure, on the exposed substrate.

Abstract: Soft magnetic film fabricated with preferred uniaxial anisotropy for perpendicular recording. One type of cathode design has a field direction that is parallel to the direction of the Hex of the second SUL with a magnetically-pinned first SUL. In addition, SUL structures having low AP exchange energy also are disclosed. The SUL structure combines the cathode field direction of the SUL2 with the pinned SUL1. The SUL1 is magnetically pinned to the pinning layer and the pinning direction is parallel to the direction of the cathode field applied during deposition of the SUL1. High Hc ferro-magnetic materials may be deposited onto a heated substrate that is magnetized along the radial direction by the cathode field. The pinning field may be higher than the cathode field, indicating that the cathode field during deposition of the SUL2 cannot disturb the magnetic state of the SUL1 pinned to pinning layer.

Abstract: Techniques for fabricating magnetic nanoparticles are provided. In one embodiment, a method performed under the control of at least one apparatus for fabricating magnetic nanoparticles includes preparing a substrate that defines at least one cavity through a portion thereof, soaking the substrate with a solution, the solution including a multiple number of magnetic nanoparticles, and applying a magnetic field so as to collect at least a portion of the magnetic nanoparticles into the at least one cavity.

Abstract: A method for producing a magnetic sheet wherein a magnetic sheet composition onto a substrate. The magnetic sheet composition contains: a binder; magnetic powder; and a curing agent, wherein the binder contains a thermosetting organic resin, and the curing agent contains a sulfonium borate complex expressed by General Formula 1: where R1 is an aralkyl group, R2 is a lower alkyl group, X is a halogen atom, and n is an integer of 0 to 3.

Abstract: A production method of a magnetic recording medium of the present invention includes: a step of forming a magnetic layer (2) on a non-magnetic substrate (1); a step of forming a dissoluble layer (3) on the magnetic layer (2); a step of forming a mask layer (4) on the dissoluble layer (3); a step of patterning the dissoluble layer (3) and the mask layer (4) to a shape corresponding to a magnetic recording pattern (2a); a step of performing a partial modification or removal of the magnetic layer (2) by use of the patterned mask layer (4); and a step of dissolving the dissoluble layer (3) with a chemical agent so as to remove the dissoluble layer (3) together with the mask layer (4) formed thereon from the top of the magnetic layer (2), wherein the magnetic recording medium has the magnetically-separated magnetic recording pattern (2a).

Abstract: A method and apparatus for forming magnetic media substrates is provided. A patterned resist layer is formed on a substrate having a magnetically susceptible layer. A conformal protective layer is formed over the patterned resist layer to prevent degradation of the pattern during subsequent processing. The substrate is subjected to an energy treatment wherein energetic species penetrate portions of the patterned resist and conformal protective layer according to the pattern formed in the patterned resist, impacting the magnetically susceptible layer and modifying a magnetic property thereof. The patterned resist and conformal protective layers are then removed, leaving a magnetic substrate having a pattern of magnetic properties with a topography that is substantially unchanged.

Abstract: An aspect of the present invention relates to a glass substrate for a magnetic recording medium, which is comprised of glass with a glass transition temperature of equal to or greater than 600° C., an average coefficient of linear expansion at 100 to 300° C. of equal to or greater than 70×10?7/° C., a Young's modulus of equal to or greater than 81 GPa, a specific modulus of elasticity of equal to or greater than 30 MNm/kg, and a fracture toughness value of equal to or greater than 0.9 MPa·m1/2.

Abstract: Provided is a substrate structure and a manufacturing method thereof, the substrate structure including a base substrate of single crystal; and a rhombohedral ferroelectric thin film exhibiting a spontaneous ferroelectric polarization and of a perovskite structure, the ferroelectric thin film being formed on a surface of the base substrate. The substrate structure may further include an optical waveguide formed on the ferroelectric thin film; and an electric field applying section that applies, to the optical waveguide, an electric field parallel to a surface of the base substrate. The electric field applying section generates the electric field so that the electric field direction of the electric field applied to the optical waveguide is parallel to a direction of the spontaneous ferroelectric polarization of the ferroelectric thin film.

Abstract: A novel, technique: for manufacturing bit patterned media is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for manufacturing hit pattern media. The technique, which may be realized as a method comprising: forming a non-catalysis region on a first portion of a catalysis layer; forming a non-magnetic separator on the non-catalysis region; and forming a magnetic active region on it second portion of the catalysis layer adjacent to the first portion of the catalysis layer.

Abstract: An apparatus and method for producing a screen is provided. The method includes propelling a quantity of paint comprising metallic flakes, such as aluminum flakes, toward the screen. The method also includes applying at least one magnetic field in a vicinity of the screen, wherein applying the at least one magnetic field causes at least one metallic flake in the quantity of paint to be oriented relative to the screen in a substantially preferred orientation, thereby producing a screen exhibiting beneficial projection qualities, such as brightness. The magnetic field(s) applied may be unsymmetric in the time domain of, for example, an AC component of the magnetic field.

Abstract: 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.

Abstract: A method of forming a high performance magnetic tunnel junction (MTJ) is disclosed wherein the tunnel barrier includes at least three metal oxide layers. The tunnel barrier stack is partially built by depositing a first metal layer, performing a natural oxidation (NOX) process, depositing a second metal layer, and performing a second NOX process to give a MOX1/MOX2 configuration. An uppermost metal layer on the MOX2 layer is not oxidized until after the MTJ stack is completely formed and an annealing process is performed to drive unreacted oxygen in the MOX1 and MOX2 layers into the uppermost metal layer. In an alternative embodiment, a plurality of metal oxide layers is formed on the MOX1 layer before the uppermost metal layer is deposited. The resulting MTJ stack has an ultralow RA around 1 ohm-?m2 and maintains a high magnetoresistive ratio characteristic of a single metal oxide tunnel barrier layer.

Abstract: A spin-torque transfer magnetic random access memory (STTMRAM) element employed to store a state based on the magnetic orientation of a free layer, the STTMRAM element is made of a first perpendicular free layer (PFL) including a first perpendicular enhancement layer (PEL). The first PFL is formed on top of a seed layer. The STTMRAM element further includes a barrier layer formed on top of the first PFL and a second perpendicular reference layer (PRL) that has a second PEL, the second PRL is formed on top of the barrier layer. The STTMRAM element further includes a capping layer that is formed on top of the second PRL.

Abstract: In one embodiment, a perpendicular magnetic head includes a main magnetic pole, a trailing shield, and a multilayered side/leading shield disposed on a leading side of the main magnetic pole in a down-track direction and on either side of the main magnetic pole in a cross-track direction. The side/leading shield includes an inner layer nearer to the main magnetic pole which surrounds the main magnetic pole on three sides and an outer layer farther from the main magnetic pole than the inner layer which surrounds the main magnetic pole and inner layer on three sides. The inner layer has a saturation magnetization (Ms) that is greater than a Ms of the outer layer, and the trailing shield has a relative permeability of greater than about 50. Other magnetic heads and methods of producing magnetic heads are also presented according to various embodiments.

Abstract: A STT-RAM MTJ is disclosed with a MgO tunnel barrier formed by natural oxidation process. A Co10Fe70B20/NCC/Co10Fe70B20, Co10Fe70B20/NCC/Co10Fe70B20/NCC, or Co10Fe70B20/NCC/Co10Fe70B20/NCC/Co10Fe70B20 free layer configuration where NCC is a nanocurrent channel layer made of Fe(20%)-SiO2 is used to minimize Jc0 while enabling higher thermal stability, write voltage, read voltage, Ho, and Hc values that satisfy 64 Mb design requirements. The NCC layer is about 10 Angstroms thick to match the minimum Fe(Si) grain diameter size. The MTJ is annealed with a temperature of about 330° C. to maintain a high magnetoresistive ratio while maximizing Hk?(interfacial) for the free layer thereby reducing Heff and lowering the switching current. The Co10Fe70B20 layers are sputter deposited with a low pressure process with a power of about 15 Watts and an Ar flow rate of 40 standard cubic centimeters per minute to lower Heff for the free layer.

Abstract: A method for applying a low residual stress damping coating to a surface of a substrate is provided. The method includes heating a ferromagnetic damping material in powder form such that the ferromagnetic damping material is at least partially molten. Next, the at least partially molten ferromagnetic damping material is directed at a surface of the substrate at an application velocity so that it adheres to the surface of the substrate to create a ferromagnetic damping coating on the surface of the substrate, resulting in a coated substrate. The ferromagnetic damping coating has a balanced coating residual stress, including a tensile quenching stress component and a compressive peening stress component. The balanced coating residual stress is within a range of ±50 MPa without having to subject the coated substrate to a high temperature annealing process. The resulting coated substrate exhibits a high damping capacity.

Abstract: A method for manufacturing a film, the method having the steps creating a cast film having a polymer component, a monomer component, a nanoparticle component, a magnetic-filler component, or a combination thereof; shearing the cast film; aligning a cast-film component by applying an electric field to the cast film; aligning a cast-film component by applying a magnetic field to the cast film; curing or polymerizing a cast-film component; annealing the cast film; and evaporating solvent from the cast film.

Abstract: A bit patterned magnetic media design for reducing the amount of magnetic material located in the trenches between topographic features is disclosed. An intermediate non-magnetic layer is deposited on the topography prior to depositing the functional magnetic layer on the topographic substrate features. The non-magnetic layer increases the width of the land regions that will ultimately support the functional magnetic layer. The non-magnetic layer also reduces the amount of trench deposition that can occur in the subsequent deposition of the magnetic recording layer. By eliminating most of the magnetic trench material, the amount of magnetic flux and readback interference produced by the trench material is reduced to an acceptable level.

Abstract: The present invention generally relates to a TMR reader and a method for its manufacture. The TMR reader discussed herein adds a shield layer to the sensor structure. The shield layer is deposited over the capping layer so that the shield layer and the capping layer collectively protect the free magnetic layer within the sensor structure from damage during further processing. Additionally, the hard bias layer is shaped such that the entire hard bias layer underlies the hard bias capping layer so that a top lead layer is not present. By eliminating the top lead layer and including a shield layer within the sensor structure, the read gap is reduced while still protecting the free magnetic layer during later processing.

Abstract: According to one embodiment, a magnetic head includes a barrier layer having a crystalline structure, a first magnetic layer above the barrier layer, a magnetic insertion layer above the first magnetic layer, and a second magnetic layer above the magnetic insertion layer, the second magnetic layer having a textured face-centered cubic (fcc) structure. The first magnetic layer comprises a high spin polarization magnetic material having a crystalline structure and a characteristic of crystallization being more similar to the crystalline structure of the barrier layer than a crystalline structure of the second magnetic layer and the magnetic insertion layer comprises a magnetic material having a crystalline structure and a characteristic of crystallization being more similar to the crystalline structure of the second magnetic layer than the crystalline structure of the barrier layer. Additional magnetic head structures and methods of producing magnetic heads are described according to more embodiments.

Abstract: A spin transfer oscillator (STO) structure is disclosed that includes two assist layers with perpendicular magnetic anisotropy (PMA) to enable a field generation layer (FGL) to achieve an oscillation state at lower current density for MAMR applications. In one embodiment, the STO is formed between a main pole and write shield and the FGL has a synthetic anti-ferromagnetic structure. The STO configuration may be represented by seed layer/spin injection layer (SIL)/spacer/PMA layer 1/FGL/spacer/PMA layer 2/capping layer. The spacer may be Cu for giant magnetoresistive (GMR) devices or a metal oxide for tunneling magnetoresistive (TMR) devices. Alternatively, the FGL is a single ferromagnetic layer and the second PMA assist layer has a synthetic structure including two PMA layers with magnetic moment in opposite directions in a seed layer/SIL/spacer/PMA assist 1/FGL/spacer/PMA assist 2/capping layer configuration. SIL and PMA assist layers are laminates of (CoFe/Ni)x or the like.

Abstract: A method of forming a high performance magnetic tunnel junction (MTJ) is disclosed wherein the tunnel barrier includes at least three metal oxide layers. The tunnel barrier stack is partially built by depositing a first metal layer, performing a natural oxidation (NOX) process, depositing a second metal layer, and performing a second NOX process to give a MOX1/MOX2 configuration. An uppermost metal layer on the MOX2 layer is not oxidized until after the MTJ stack is completely formed and an annealing process is performed to drive unreacted oxygen in the MOX1 and MOX2 layers into the uppermost metal layer. In an alternative embodiment, a plurality of metal oxide layers is formed on the MOX1 layer before the uppermost metal layer is deposited. The resulting MTJ stack has an ultralow RA around 1 ohm-?m2 and maintains a high magnetoresistive ratio characteristic of a single metal oxide tunnel barrier layer.

Abstract: A method of making a current-perpendicular-to-the-plane giant magnetoresistive (CPP-GMR) sensor with a confined-current-path (CCP) layer uses an array of self-assembled ferritin protein molecules with inorganic cores to make the CCP layer in the sensor stack. In one embodiment, the ferritin molecules with cores of insulating oxide particles are deposited on an electrically conductive support layer and the ferritin molecules are dissolved, leaving an array of insulating oxide particles. An electrically conducting layer is deposited over the oxide particles and into the regions between the oxide particles to form the CCP layer. In another embodiment, the ferritin molecules with inorganic particles in their cores are deposited on an electrically insulating support layer and the ferritin molecules are dissolved, leaving an array of inorganic particles that function as an etch mask.

Abstract: Disclosed is a method of manufacturing a magnetic recording medium having a clear magnetic recording pattern through a simple process. The method includes: forming a magnetic layer on the non-magnetic substrate; forming a mask layer which covers a surface of the magnetic layer; forming a resist layer on the mask layer; patterning the resist layer using a stamp; patterning the mask layer using the resist layer, forming a recess by partially removing a portion of the magnetic layer not covered by the mask layer; forming a non-magnetic layer which covers a surface where a recess is formed; flattening a surface of the non-magnetic layer until the mask layer is exposed; removing an exposed mask layer; removing a protruding portion of the non-magnetic layer; and forming a protective layer which covers a surface where the protruding portion was removed.

Abstract: Magnetic write heads and corresponding fabrication methods for bi-layer wrap around shields resulting in dissimilar shield layer widths are disclosed. A gap structure is formed around a main write pole for a magnetic write head. A wrap around shield for the main write pole is fabricated to include a first magnetic layer proximate to the main write pole and a second magnetic layer on the first magnetic layer. A width of the first magnetic layer is less than the width of the second magnetic layer, and back edges of the first and second magnetic layers are coplanar. Further, a throat height of the wrap around shield is maintained between the first and the second magnetic layers because their back edges are coplanar.

Abstract: Methods for creating a precision assembly of nanoparticles by controlled deposition from a colloidal fluid (e.g., a ferrofluid) are disclosed. The method can include assembling magnetic nanoparticles, fixing the nanoparticles in place, and then allowing the completed nanoparticle assembly to be washed and dried to remove unwanted process contaminants left in the assembly fluid while preserving the underlying nanoparticle assembly as designed.

Abstract: The present invention is related to magnetic pigments comprising a transparent flaky homogeneously composed substrate having two parallel major surfaces and a coating comprising maghemite, to a process for the production of said pigments as well as to their use.

Abstract: Methods of fabricating magnetic write heads and electrical lapping guides (ELG's) using a split gap deposition process is described. A removal process is performed on a magnetic material to define a main write pole and to define a corresponding ELG for the main write pole. A first non-magnetic gap layer is deposited. A mask and liftoff process is performed to deposit an electrically conductive material on the first gap layer disposed along a front edge of the ELG. A second non-magnetic gap layer is then deposited and a shield is fabricated for the write pole.

Abstract: Techniques for attaining high performance magnetic memory devices are provided. In one aspect, a magnetic memory device comprising one or more free magnetic layers is provided. The one or more free magnetic layers comprise a low magnetization material adapted to have a saturation magnetization of less than or equal to about 600 electromagnetic units per cubic centimeter. The device may be configured such that a ratio of mean switching field associated with an array of non-interacting magnetic memory devices and a standard deviation of the switching field is greater than or equal to about 20. The magnetic memory device may comprise a magnetic random access memory (MRAM) device. A method of producing a magnetic memory device is also provided.

Abstract: The present invention relates to a method for manufacturing a magnetoresistive element having a magnetization pinned layer, a magnetization free layer, and a spacer layer including an insulating layer provided between the magnetization pinned layer and the magnetization free layer and current paths penetrating into the insulating layer. A process of forming the spacer layer in the method includes depositing a first metal layer forming the metal paths, depositing a second metal layer on the first metal layer, performing a pretreatment of irradiating the second metal layer with an ion beam or a RF plasma of a rare gas, and converting the second metal layer into the insulating layer by means of supplying an oxidation gas or a nitriding gas.

Abstract: Provided are a patterned magnetic recording medium which has an extremely planarized surface and a method of manufacturing the same. The medium includes a patterned magnetic layer including a plurality of magnetic columns that are arranged with a predetermined pitch therebetween; a substrate that supports the patterned magnetic layer; and a boundary layer, which is filled in gaps between the magnetic columns of the patterned magnetic layer. Thus, an air bearing due to stable airflow is created over the magnetic layer, and magnetic recording/reproduction are easily achieved at ultrahigh density.

Abstract: A novel structure is provided in which an ordered alloy material is filled in pores of the structure. A process for producing the structure is also provided. The process comprises a first step for forming an alloy in pores of a porous layer, a second step for forming a film composed of a second material on the porous layer, and a third step for heat-treating the porous layer having the film. Further a process is provided for producing a structure containing fine L10-crystal grains with a low-temperature heat treatment. This process comprises a process for producing a structure containing a magnetic substance dispersed in a nonmagnetic material, comprising: forming a first layer containing a magnetic substance A dispersed in a nonmagnetic material, forming a second layer containing a magnetic substance B on the first layer, and heating the first layer and the second layer during or after formation of the second layer to connect the magnetic substance A and the magnetic substance B to form an ordered alloy.

Abstract: A method for forming magnetic media is provided. The method of forming the magnetic media includes forming a plurality of regions of resist material on a top surface of a substrate which defines a plurality of regions of exposed substrate on the top surface of the substrate between adjacent ones of the plurality of regions of resist material. The method also includes forming magnetic material on the plurality of regions of resist material and the plurality of regions of exposed substrate and depositing material over the magnetic material, the material encapsulating a portion of the magnetic material formed on the plurality of regions of exposed substrate. A magnetic recording medium formed in accordance with the method is also provided.

Abstract: A method for the production of a magnetic recording medium includes the steps of forming a magnetic layer on a nonmagnetic substrate, injecting atoms into portions of the magnetic layer to cause the portions to be demagnetized or allowed to acquire amorphousness, thereby forming a magnetically separated magnetic recording pattern, the step of injecting atoms including the steps of applying to a surface of the formed magnetic layer an SOG film as a resist, partly removing or thinning the resist, and irradiating the surface with atoms, thereby partly injecting atoms into the magnetic layer through the portions of the magnetic layer from which the resist is removed or in which the resist is thinned.