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8163405 |
System, method and apparatus for multiple anisotropy layered magnetic structures for controlling reversal mechanism and tightening of switching field distribution in bit patterned media
Multiple anisotropy layered magnetic structures for controlling reversal mechanism and tightening of switching field distribution in bit patterned media are disclosed. The invention extends the...
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8147996 |
Perpendicular media with dual soft magnetic layers
A recording medium having a substrate, a first soft magnetic underlayer, a second soft magnetic underlayer and a perpendicular magnetic recording layer without a spacer layer between the first and...
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8119264 |
Perpendicular magnetic recording disk with ultrathin nucleation film for improved corrosion resistance and method for making the disk
A perpendicular magnetic recording disk has a granular cobalt alloy recording layer (RL) containing an additive oxide or oxides, an intermediate layer (IL) as an exchange-break layer on the...
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8076013 |
Magnetic recording medium, magnetic recording medium manufacturing method, and magnetic disk
A magnetic recording medium (10) has a substrate (12) and a perpendicular magnetic recording layer (30) formed over the substrate (12). The perpendicular magnetic recording layer (30) has a...
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8048545 |
Perpendicular magnetic recording media with magnetic anisotropy gradient and local exchange coupling
A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed...
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8036070 |
Magnetic recording device, especially for a hard disk and its manufacturing process
A magnetic recording device comprising at least one unstructured recording support exhibiting at least one elementary magnetic layer, the recording support having a magnetization perpendicular to...
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8021770 |
Perpendicular magnetic recording medium
A perpendicular type of magnetic recording medium includes a substrate, a soft magnetic underlying section including a plurality of distinct layers soft magnetic material, a recording section, and...
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8007931 |
Magnetic recording medium
A perpendicular magnetic recording medium including: a substrate; a perpendicular magnetic recording layer disposed over the substrate; a soft magnetic underlayer disposed between the substrate and...
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7989097 |
Perpendicular magnetic recording medium with tilted easy axis of magnetization, method of manufacturing magnetic recording medium, and magnetic recording apparatus comprising magnetic recording medium
According to one embodiment, a magnetic recording medium includes a substrate, a first underlayer formed on the substrate and including an amorphous alloy containing Ni, a crystalline second...
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7976965 |
Magnetic recording medium and magnetic recording and reproducing device
A magnetic recording medium comprises a nonmagnetic substrate on which is disposed at least a vertical magnetic layer. The vertical magnetic layer comprises at least three layers including a lower...
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7955723 |
Magnetic recording medium substrate and perpendicular magnetic recording medium
A perpendicular magnetic recording medium comprising a pair of soft magnetic layers that are laminated via a non-magnetic layer and antiparallel-coupled to each other and that are provided between...
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7943248 |
Perpendicular magnetic recording media, production process thereof, and perpendicular magnetic recording and reproducing apparatus
Perpendicular magnetic recording media enabling high-density recording and reproduction of information, as well as a production process thereof, and a magnetic recording and reproducing apparatus,...
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7919201 |
Method of making a multilayered magnetic structure
A longitudinal magnetic recording medium comprising at least four magnetic layers including a substrate, a CoCrTa magnetic intermediate layer on the substrate, wherein the CoCrTa magnetic...
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7901802 |
Magnetic recording medium for perpendicular magnetic recording
A perpendicular recording medium having a perpendicular magnetic recording layer and a magnetically soft underlayer structure disposed beneath the recording layer. The soft underlayer structure...
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7875371 |
Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the same
Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded...
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7862912 |
Perpendicular magnetic recording medium and system with low-curie-temperature multilayer for heat-assisted writing and/or reading
A perpendicular magnetic recording medium, usable for either continuous or patterned media, has a recording layer structure (RLS) of first and second perpendicular magnetic layers (PM1, PM2) and an...
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7846563 |
Perpendicular magnetic recording exchange-spring type medium with a lateral coupling layer for increasing intergranular exchange coupling in the lower magnetic layer
A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The...
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7846564 |
Perpendicular magnetic recording media with magnetic anisotropy/coercivity gradient and local exchange coupling
A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed...
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7842409 |
Anti-ferromagnetically coupled perpendicular magnetic recording media with oxide
The present invention relates to perpendicular magnetic recording media with improved signal-to-medium noise ratio (“SMNR”) and thermal stability, which media include a pair of vertically spa...
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7842408 |
Magnetic film, manufacturing method thereof and thin film magnetic head
Embodiments of the present invention provide a magnetic disk drive capable of allowing higher data transfer rates and higher recording densities. According to one embodiment, an upper magnetic core...
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7807278 |
Perpendicular magnetic recording medium and magnetic storage apparatus
A perpendicular magnetic recording medium, including a soft-magnetic backing layer; and a recording layer provided over the oft-magnetic backing layer. There is provided a magnetic flux slit layer...
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7799445 |
Perpendicular magnetic recording media with soft magnetic underlayer
A perpendicular magnetic recording medium including a soft magnetic underlayer. The perpendicular magnetic recording medium includes: a lower structural body including an anti-ferromagnetic layer;...
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7781080 |
Perpendicular magnetic recording medium
A perpendicular magnetic recording medium composed of a nonmagnetic substrate having a surface onto which are provided a plurality of layers including, in the order recited, a soft underlayer; a...
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7736766 |
Magnetic storage media with Ag, Au-containing magnetic layers
A magnetic recording medium having a Au, Ag-containing magnetic layer having Co, Cr, Ag and Au; the magnetic recording layer having Co-containing magnetic grains surrounded by substantially...
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7704613 |
Magnetic recording medium for high density recording
A bit error rate is improved and, at the same time, an aging change due to thermal fluctuation is decreased. In one embodiment, a magnetic recording medium has first, second, third, and fourth...
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7691500 |
Perpendicular magnetic recording medium
Embodiments of the present invention help to provide an excellent perpendicular recording medium of high medium signal-to-noise (S/N) and with suppressed blurring in writing. According to one...
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7678476 |
Composite heat assisted magnetic recording media with temperature tuned intergranular exchange
A thin film structure comprises a first layer including a first plurality of grains of magnetic material having a first intergranular exchange coupling, and a second layer positioned adjacent to...
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7666529 |
Anti-ferromagnetically coupled soft underlayer
A magnetic recording medium having a first magnetic layer, a spacer layer, and a second magnetic layer, in this order, wherein the spacer layer includes a non-magnetic layer and a thickness of the...
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7645528 |
Magnetic recording media with ultra-high recording density
An AFC magnetic recording medium having a three-layered ferromagnetic structure capable of reducing noises without deteriorating thermal stability is provided in order to achieve ultra-high...
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7638210 |
Perpendicular magnetic recording medium with exchange-coupled magnetic layers and improved coupling layer
A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) with an improved coupling layer (CL). The RL includes the first or lower ferromagnetic lay...
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7625643 |
Magnetic recording medium, magnetic storage apparatus and recording method
A magnetic recording medium is provided with a first magnetic layer, a nonmagnetic coupling layer provided on the first magnetic layer, and a second magnetic layer provided on the nonmagnetic...
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7601443 |
Perpendicular magnetic recording media with laminated soft magnetic underlayer
A recording medium including a perpendicular magnetic recording layer and a laminated SUL formed on a substrate is provided. The SUL includes an antiferromagnetic layer interposed between laminated...
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7592080 |
Perpendicular magnetic recording medium
A perpendicular magnetic recording medium includes a nonmagnetic substrate; a first underlayer provided on the nonmagnetic substrate; a first nonmagnetic intermediate layer provided on the first...
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7588842 |
Perpendicular magnetic recording medium with a pinned soft underlayer
A magnetic recording medium and a magnetic recording apparatus for perpendicular magnetic recording. The recording medium includes a magnetically soft underlayer and a hard magnetic pinning layer...
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7572527 |
Perpendicular magnetic recording medium with improved antiferromagnetically-coupled recording layer
A perpendicular magnetic recording disk has an antiferromagnetically-coupled (AFC) recording layer (RL) comprised of lower and upper ferromagnetic layers, each having a hexagonal-close-packed (hcp)...
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7556870 |
Antiferromagnetically coupled media for magnetic recording with weak coupling layer
An embodiment of the invention is a layered magnetic thin film structure that uses antiferromagnetically coupled (AFC) magnetic layers where the top layer structure consists of an upper magnetic...
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7550210 |
Perpendicular magnetic recording medium with multiple exchange-coupled magnetic layers having substantially similar anisotropy fields
A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) formed of two ferromagnetic layers with substantially similar anisotropy fields that are fer...
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7532436 |
Magnetic recording medium and magnetic memory device for high density recording
A longitudinal magnetic recording medium having a high medium S/N, with no problems in view of the overwrite characteristic, excellent in the bit error rate and sufficiently stable also to thermal...
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7529065 |
Laminated magnetic thin films with weak antiferromagnetic coupling for perpendicular magnetic recording
The invention uses an upper and lower magnetic layer of a laminated magnetic layer structure that includes an AF spacer layer that results in weak antiferromagnetic coupling of the magnetic layers...
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7521136 |
Coupling enhancement for medium with anti-ferromagnetic coupling
Laminated magnetic recording medium with two Co-containing layers separated by a non-magnetic Ru-containing interlayer is stabilized by Ru-containing layer between the recording layers and...
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7514161 |
Laminated antiferromagnetically coupled media with decoupled magnetic layer
A laminated film structure is disclosed comprising multiple ferromagnetic layers achieving improved data recording performance. A non-magnetic spacer layer is disposed between an upper...
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7514162 |
Perpendicular magnetic recording medium with metamagnetic antiferromagnetically-coupled layer between the soft underlayer and recording layer
A perpendicular magnetic recording medium includes a metamagnetic antiferromagnetically-coupled (AFC) layer between the recording layer (RL) and the soft magnetically permeable underlayer (SUL)....
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7510788 |
Perpendicular magnetic recording medium utilizing a first cobalt magnetic layer and a second Pd-SiOx layer and method of manufacturing same
A perpendicular magnetic recording medium is disclosed that exhibits reduced media noise and enhanced thermal stability of recorded magnetization, and thus provides a medium of high recording...
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7498092 |
Perpendicular magnetic recording medium with magnetic torque layer coupled to the perpendicular recording layer
A perpendicular magnetic recording medium, such as a perpendicular magnetic recording disk, has a magnetic “torque” layer (MTL) that exerts a magnetic torque onto the perpendicular magnetic rec...
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7488545 |
Perpendicular magnetic recording medium with laminated recording layers formed of exchange-coupled ferromagnetic layers
A laminated perpendicular magnetic recording medium has two recording layers (RL1 and RL2) that are separated and magnetically decoupled by a nonmagnetic spacer layer (SL). The SL has a thickness...
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7479332 |
Method and apparatus for improving signal-to-noise ratio in longitudinal recording media
A method and apparatus for improving the signal-to-noise ratio in a longitudinal recording media is disclosed. The apparatus includes a first recording layer of the longitudinal recording media...
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7422808 |
Vertical magnetic recording medium, magnetic recording apparatus and manufacturing method of a vertical magnetic recording medium
A vertical magnetic recording medium includes a substrate, a soft magnetic backing layer formed on the substrate, a magnetic flux confinement layer formed on the soft magnetic backing layer, an...
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7419730 |
Magnetic recording disk with antiferromagnetically coupled master layer including copper
An antiferromagnetically coupled (AFC) magnetic recording medium with an AFC master layer comprising at least two magnetic layers with the top magnetic layer including copper is described. The...
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7399540 |
Perpendicular magnetic recording media, magnetic recording apparatus
A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic...
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7378164 |
Soft underlayer structure for magnetic recording
A magnetic recording medium having a soft magnetic underlayer structure that includes two soft underlayers is presented. A thick first soft underlayer, disposed on the medium substrate, is made of...
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