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7625646 |
Perpendicular magnetic recording medium and method of manufacturing it
Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of...
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7601445 |
Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus
To make possible high density recording by making the structure of the perpendicular magnetic recording layer finer. A perpendicular magnetic recording medium 10 includes at least a nonmagnetic...
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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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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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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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7482071 |
Perpendicular magnetic recording disk with improved recording layer having high oxygen content
A perpendicular magnetic recording disk has an improved recording layer of a granular CoPtCr-based ferromagnetic alloy with inter-granular material made up of one or more oxides of Cr and one or...
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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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7429427 |
Granular magnetic recording media with improved grain segregation and corrosion resistance
Disclosed are granular magnetic recording media with improved grain segregation and corrosion resistance, comprising a non-magnetic substrate and at least one granular magnetic recording layer...
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7241519 |
Magnetic recording medium with columar magnetic layer
Provided is a magnetic recording medium capable of achieving higher density recording. The magnetic recording medium comprises a magnetic layer formed on a non-magnetic base through vacuum oblique...
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7192664 |
Magnetic alloy containing TiO2 for perpendicular magnetic recording application
The SMNR of a granular perpendicular recording medium is significantly enhanced by incorporating TiO 2 at the grain boundaries of the magnetic alloy layer. Embodiments include granular...
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7144642 |
Permanent magnet and method for preparation thereof
A ferrite magnet obtained by adding a ferrite having a hexagonal W-type magnetoplumbite structure to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb...
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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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6884520 |
Perpendicular magnetic recording medium and method of manufacturing the same and product thereof
A perpendicular magnetic recording medium has a nonmagnetic substrate, a nonmagnetic underlayer, a magnetic layer, a protective film, and a liquid lubrication layer sequentially laminated on the...
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6861126 |
Magnetic recording medium possessing a magnetic layer having plural oxygen-containing regions
On a polymeric substrate 1 , there is formed with a single magnetic layer 2 containing a ferromagnetic metal and oxygen. The magnetic layer 2 is divided into three regions equally in the depth...
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6821618 |
Magnetic recording medium and process for producing the same
A magnetic recording medium exhibiting a high coercive force and excellent squareness having a substrate, an underlayer formed on the substrate, and a spinel-type iron oxide thin film with...
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6746749 |
Magnetic recording disk
The magnetic recording medium includes an underlayer 12 formed of an inorganic compound layer, and a magnetic layer 13 formed over the underlayer 12 . The inorganic compound layer as the...
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6716542 |
Sputtering target for production of a magnetic recording medium
The present invention provides a sputtering target for production of a magnetic recording medium including at least a nonmagnetic undercoat layer, a magnetic layer, and a protective layer laminated...
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6696172 |
Recording medium and method for manufacturing the same
A magnetic recording medium has at least a non-magnetic under-layer, a magnetic layer, a protective layer and a liquid lubricant layer sequentially laminated on a non-magnetic substrate. The...
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6310837 |
Magnetic recording medium
The invention is a magnetic recording medium which is effectively protected against forgery by the alteration of recorded data, and a method for carrying out writing and reading on this magnetic...
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6177208 |
Magnetic recording system and magnetic recording medium used therefor
A magnetic recording system high in S/N and low in bit error rate, capable of carrying out writing and reading of high recording density of at least 1 gigabit per 1 square inch and high in...
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6174597 |
Magnetic recording apparatus
A magnetic recording apparatus includes a magnetic recording medium including a substrate and a magnetic recording layer formed on the substrate and having a structure in which magnetic grains are...
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6165608 |
Magnetic recording medium
A magnetic recording medium of the present invention comprises: a substrate; and a cobalt-containing maghemite thin film formed on said substrate, containing cobalt at a molar ratio of cobalt to...
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6146761 |
Functional particle-dispersed thin film, granular magnetic thin film and production processes thereof
A functional particle-dispersed thin film and a granular magnetic thin film are described with production processes thereof. The thin film is composed of plural seed crystal particles each...
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5863661 |
Method of enhancing the c-axis perpendicular orientation of barium hexaferrite thin films and barium hexaferrite thin film recording media produced thereby
A method of making c-axis perpendicularly oriented barium hexaferrite thin films by the crystallization of amorphous barium hexaferrite on a platinum underlayer is provided. Using a thin underlayer...
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5853847 |
Magnetic recording medium and its manufacture
An inexpensive high-density recording medium which is increased in coercive force without using expensive ferromagnetic metallic layer. In a magnetic recording medium on the base body of which a...
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5853871 |
Magnetic recording medium
A magnetic recording medium comprising a substrate, a magnetic layer, a protective layer and a lubricant layer, wherein the magnetic layer is coated on the substrate, the protective layer is coated...
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5830569 |
Magnetic recording medium containing CoPtO-based alloy magnetic film
A magnetic recording medium of this invention includes an underlayer formed on a substrate and made of a material containing vanadium as a main constituent, and a magnetic film formed on the...
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5759710 |
Magnetic recording medium with a magnetic layer having a specific oxygen signal strength profile in the thickness direction
A method and a device for manufacturing a thin film by a vacuum deposition method, and a magnetic recording medium produced thereby are disclosed. A thin film of high quality is mass-produced while...
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5503943 |
Magnetic recording medium
A metal thin film magnetic recording medium having improved S/N and reduced noise is disclosed, which has a ferromagnetic metal thin film composed mainly of Co on a non-magnetic support,...
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5496631 |
Perpendicular magnetic film, multilayered film for perpendicular magnetic film and process for producing perpendicular magnetic film
Disclosed herein is a perpendicular magnetic film comprising a spinel thin film which is formed on a substrate, which contains Fe as the main ingredient and further contains Co and Ni, and which...
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5492775 |
Barium ferrite thin film for longitudinal recording
A high-density recording media comprising longitudinally oriented polycrystalline barium ferrite exhibits large coercivity, corrosion resistance, high hardness and durability. Films are prepared by...
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5492774 |
Perpendicular magnetic recording medium and process for production of the same
A perpendicular magnetic recording medium having a magnetic layer comprised of a metal magnetic thin film on a nonmagnetic support. The half-value width of the switching field distribution obtained...
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5413868 |
Perpendicular magnetic recording medium comprising a magnetic thin film of cobalt, palladium, chromium and oxygen
A magnetic recording medium comprising a nonmagnetic substrate having thereon a magnetic layer, wherein the magnetic layer is a metal thin film comprising mainly a composition represented by the...
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5326637 |
Magnetic recording medium having a Co-O magnetic layer, and specified in-plane properties
A magnetic recording medium is disclosed, wherein a magnetic film comprising a partially oxidized cobalt with its in-plane coercive force not less than 500 Oe is provided on a substrate. Further...
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5244751 |
Perpendicular magnetic recording medium, its fabrication method and read-write machine using it
There is disclosed a perpendicular magnetic recording medium having a magnetic layer comprising magnetic metal corpuscles and their oxide formed on a nonmagnetic substrate, and having perpendicular...
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5094898 |
Magnetic recording medium comprising a glass substrate of controlled surface roughness and a magnetic thin film layer of gamma Fe.sub.2 O.sub.3
A magnetic recording disk comprising a rigid substrate and a magnetic layer of the continuous thin film type predominantly composed of γ-Fe 2 O 3 shows high durability, especially CSS durability...
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5073449 |
Magnetic recording medium and method for producing the same
A magnetic recording medium comprising a substrate and a ferromagnetic metal layer, wherein the ferromagnetic metal layer includes hydrated amorphous cobalt oxide, a X-ray photoelectron spectra...
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5066552 |
Low noise thin film metal alloy magnetic recording disk
An improved CoPt alloy magnetic recording disk for horizontal recording has a magnetic recording layer which includes oxygen, the oxygen being present preferably in the range of approximately 5 to...
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5062938 |
High coercivity low noise cobalt alloy magnetic recording medium and its manufacturing process
A cobalt alloy disk for horizontal magnetic recording has both high coercivity and low noise at high recording density. The magnetic layer in the disk contains, in addition to the cobalt alloy...
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5045412 |
Perpendicular magnetic storage medium
A perpendicular magnetic storage medium in which a perpendicular magnetic anisotropic film having an easy magnetization axis perpendicular to the plane thereof is formed on a substrate, wherein the...
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4975324 |
Perpendicular magnetic film of spinel type iron oxide compound and its manufacturing process
Disclosed herein is a perpendicular magnetic film of spinel type iron oxide formed on a surface of a base substrate in the form of columnar grains which are densely arranged perpendicularly to the...
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4968564 |
Magnetic recording medium
A magnetic recording medium comprising a non-magnetizable substrate and a magnetic layer formed on the substrate, in which the magnetic layer comprises not more than 13% by weight of one or more of...
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4939046 |
Magnetic recording medium
A magnetic recording medium employing the ferromagnetic film as the magnetic layer is disclosed in which the non-magnetic metal and/or the non-magnetic metal oxide are diffused into the...
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4873154 |
Magnetic recording medium containing Fe, Co, N and O
A magnetic recording medium, such as a tape, having a thin ferromagnetic film containing Fe a Co b N c O d satisfying: 32%≤a≤90%; 5%≤b≤55%; 2%≤c≤28%; 5%≤d≤23%; and c+d≤40%....
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4855175 |
Magnetic recording medium and production thereof
A magnetic recording medium comprising a substrate and, as a recording layer, a ferromagnetic metal thin layer formed on the substrate by deposition, in which the ferromagnetic metal thin layer...
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4764436 |
Iron-oxygen based perpendicular magnetized anisotropic thin film
A thin film according to the present invention which is disclosed herein is an iron and oxygen based perpendicular magnetized anisotropic thin film useful as a magnetic recording material. This...
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4726988 |
Vertical magnetic recording medium
A vertical magnetic recording medium comprising a substrate and a magnetic layer formed on the substrate and having a magnetic anisotropy in the direction vertical to the surface of the substrate...
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4645690 |
Method of manufacturing a magnetic media
A manufacturing process of Co-Ni magnetic recording media by sputtering Co-Ni thin film layer on a substrate in Argon atmosphere including oxygen or air and heating the thin film to evaporate...
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4626480 |
Magnetic recording medium comprising a vacuum-deposited magnetic film of a magnetic material and a tungsten oxide and method for making the same
Magnetic recording media for high density recording having a much improved coercive force comprise a non-magnetic substrate and a magnetic thin film formed on at least one side of the non-magnetic...
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4618542 |
Magnetic thin film
A magnetic thin film comprised of at least one, usually two magnetic metals selected from iron, nickel, and cobalt is vapor phase grown on a substrate, for example, polyimide film by introducing...
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