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7611783 |
Magnetic recording medium and magnetic recording device
A magnetic recording medium includes; a base member; an underlayer formed on the base member; a main recording layer formed on the underlayer, and a writing assist layer formed on or under the main...
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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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7592079 |
Method to improve remanence-squareness-thickness-product and coercivity profiles in magnetic media
A magnetic disk for information storage that includes a substrate and an information layer for containing information. The information layer includes a upper (e.g., recording) and lower (e.g.,...
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7582368 |
Perpendicular magnetic recording medium with an exchange-spring recording structure and a lateral coupling layer for increasing intergranular exchange coupling
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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7579095 |
Differentially oriented patterned magnetic media
A structure has a substrate and a layer containing a magnetic material dispersed in a nonmagnetic material, the magnetic material being comprised of first crystal particles having an easy...
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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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7572526 |
Perpendicular magnetic recording medium with exchange-spring structure having multiple exchange-spring layers and recording system for the medium
A perpendicular magnetic recording system uses an exchange-spring type of perpendicular magnetic recording medium. The medium has a recording layer (RL) that includes a lower media layer (ML) and a...
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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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7545604 |
Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using same
In one embodiment, a magnetic recording medium comprises an underlying film, a magnetic film and a protective film formed in this order on a substrate. The magnetic film is a cobalt-base alloy film...
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7537845 |
Perpendicular magnetic recording media
A perpendicular magnetic recording medium having a good thermal stability and a high recording density is provided. The perpendicular magnetic recording medium includes at least a first and a...
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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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7531249 |
Magnetic recording medium and method of producing the same
Provided is a magnetic recording medium having less noise and less recording degradation ascribed to “thermal fluctuation”. The magnetic recording medium has a magnetic recording film in which...
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7531248 |
Perpendicular recording magnetic media having a granular magnetic recording layer and an amorphous soft underlayer
A perpendicular magnetic recording medium having a substrate, an amorphous soft underlayer of thickness 30 nm or greater, and a granular magnetic recording layer for perpendicular recording is...
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7524570 |
Perpendicular magnetic recording system and medium with high-moment corrosion-resistant “soft” underlayer (SUL)
A perpendicular magnetic recording disk has a soft magnetic underlayer (SUL) that has high corrosion resistance as well as high moment. The material of the SUL is an alloy comprising Co, Fe, X, and...
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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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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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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...
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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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7470474 |
Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus including both oxide and non-oxide perpendicular magnetic layers
A magnetic recording medium which is provided on a nonmagnetic substrate 1 with at least an orientation-controlling layer 3 for controlling the orientation of a layer formed directly thereon, a...
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7465502 |
Composite magnetic recording structure having a metamagnetic layer with field induced transition to ferromagnetic state
A magnetic recording medium having a composite magnetic recording structure comprising the combination of a hard magnetic layer and a metamagnetic layer that possesses a field induced metamagnetic...
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7465501 |
High density magnetic recording media
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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7446969 |
Thermally assisted recording system
A thermally assisted magnetic recording system is provided to achieve excellent thermal resistance and low noise. In one embodiment, a magnetic recording medium is used, in which the magnetic...
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7435489 |
Magnetic recording medium, magnetic storage apparatus and recording method
A magnetic recording medium is provided with an exchange layer structure, and a magnetic layer provided on the exchange layer structure. The exchange layer structure includes a ferromagnetic layer...
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7425377 |
Incoherently-reversing magnetic laminate with exchange coupled ferromagnetic layers
A laminate structure is disclosed comprising multiple ferromagnetic layers achieving incoherent reversal while maintaining good SNR. A high magnetic moment density, low anisotropy field material...
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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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7419729 |
Multilayered ferromagnetic laminate having alternating cobalt alloy and iron-nitrogen alloy films for use with magnetic heads
A multilayered ferromagnetic laminate includes a first magnetic film having a cobalt alloy and a second magnetic film having an iron-nitrogen alloy. The films are deposited upon one another and...
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7402348 |
Perpendicular magnetic recording medium
A magnetic recording layer is formed on an auxiliary magnetic layer in a perpendicular magnetic recording medium. The auxiliary magnetic layer has the axis of easy magnetization in the vertical...
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7384699 |
Magnetic recording media with tuned exchange coupling and method for fabricating same
A magnetic recording medium with tuned exchange coupling comprises:
(a) a non-magnetic substrate having a surface; and (b) a stack of thin film layers on the substrate surface, including:
(i)...
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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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7354664 |
Magnetically soft, high saturation magnetization laminate of iron-cobalt-nitrogen and iron-nickel for perpendicular media underlayers
A magnetic disk has a soft magnetic underlayer comprising a first layer containing NiFe having a concentration of iron that is at least thirty percent and not more than seventy percent; a second...
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7351484 |
High field contrast magnetic stampers/imprinters for contact patterning of magnetic media
A high field contrast magnetic stamper/imprinter for use in patterning of magnetic and magneto-optical (MO) recording media by contact printing, comprises:
(a) a layer of a magnetic material...
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7351445 |
Magnetic recording media and method of forming them
The present invention is directed to carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head. By giving a patterning...
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7324305 |
Magnetic recording medium including a magnetic layer with first magnetic particles and a protective layer with second magnetic particles
The present invention enables a substantial decrease of the magnetic spacing while maintaining the flying height of the transducer and the structure of the protective layers for a magnetic...
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7298588 |
Magnetic recording media using directly textured glass
A magnetic recording medium deposited on glass and having an orientation ratio greater than one is disclosed. The magnetic recording medium includes a CoW seedlayer deposited on a circumferentially...
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7282277 |
Magnetic recording media with Cu-containing magnetic layers
A magnetic recording medium including at least one Cu-containing magnetic recording layer (CuML) comprised of a Cu-containing magnetic alloy material selected from the group consisting of:
...
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7279240 |
Laminated perpendicular magnetic recording media with uncorrelated grains
A laminated perpendicular magnetic recording medium comprises a non-magnetic substrate and at least a pair of polycrystalline, vertically stacked, spaced-apart perpendicular magnetic layers...
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7261958 |
Magnetic recording medium and magnetic recording system using the same
A magnetic recording medium having at least two magnetic layers and a non-magnetic intermediate layer held between them. The first magnetic layer (which is closer to the substrate than the...
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7241517 |
Magnetic recording medium and magnetic storage apparatus
A magnetic recording medium is constructed to include a lower magnetic layer, a nonmagnetic spacer layer disposed on the lower magnetic layer, and an upper magnetic layer disposed on the...
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7226674 |
Magnetic recording medium, method for producing the same, and magnetic recording apparatus
A magnetic recording medium based on the perpendicular magnetic recording system has a substrate which is formed of a non-magnetic material, a soft magnetic back layer which is formed of a soft...
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7217467 |
Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus
A magnetic recording/reproducing apparatus is disclosed with high storage capability. The apparatus also prevents fluctuation of readback output and decay of magnetization or erasure of recorded...
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7214404 |
Perpendicular magnetic recording disk
A perpendicular magnetic recording disk is provided. The perpendicular magnetic recording disk includes an underlayer between a substrate and a perpendicular magnetic recording layer for inducing...
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7201977 |
Anti-ferromagnetically coupled granular-continuous magnetic recording media
An anti-ferromagnetically coupled, granular-continuous (“AFC-GC”) magnetic recording medium having increased thermal stability, writability, and signal-to-medium noise ratio (“SMNR”),...
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7166376 |
Magnetic recording medium including a high-magnetostriction layer and magnetic recording/reproducing apparatus
A multi-layer including a magnetic recording layer and a high-magnetostriction layer having a magnetostriction constant larger than that of the magnetic recording layer is formed.
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7166375 |
Magnetic recording medium utilizing a multi-layered soft magnetic underlayer, method of producing the same and magnetic recording and reproducing device
A magnetic recording medium, a method for producing the same, and a magnetic recording and reproducing device are provided which can prevent spike noise and improve the error rate. The magnetic...
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7153596 |
Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic storage apparatus using the same
A soft magnetic underlayer includes a first amorphous soft magnetic layer to which an exchange bias magnetic field is applied directly from an antiferromagnetic layer or via a ferromagnetic layer,...
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7141317 |
Perpendicular magnetic recording medium
A perpendicular magnetic recording medium has a substrate, a soft magnetic underlayer formed on the substrate, arrayed soft magnetic dots formed on the soft magnetic underlayer, and a ferromagnetic...
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7132176 |
Perpendicular magnetic recording medium and magnetic recording/reproduction apparatus
A perpendicular magnetic recording medium includes a magnetic recording layer stacked on a substrate and having a first perpendicular magnetic recording layer containing cobalt, and a second...
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7097924 |
Magnetic recording media and method of forming them
The present invention is directed to-carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head. By giving a patterning...
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7081309 |
Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple ferromagnetically-coupled lower layers
A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has an upper ferromagnetic layer (UL), and a lower ferromagnetic layer structure formed of two...
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