DE3664390D1 - Anisotropic perpendicular magnetic-recording medium - Google Patents

Anisotropic perpendicular magnetic-recording medium

Info

Publication number
DE3664390D1
DE3664390D1 DE8686401561T DE3664390T DE3664390D1 DE 3664390 D1 DE3664390 D1 DE 3664390D1 DE 8686401561 T DE8686401561 T DE 8686401561T DE 3664390 T DE3664390 T DE 3664390T DE 3664390 D1 DE3664390 D1 DE 3664390D1
Authority
DE
Germany
Prior art keywords
recording medium
perpendicular magnetic
anisotropic
anisotropic perpendicular
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8686401561T
Other languages
English (en)
Inventor
Jean-Claude Bouchand
Jacques Desserre
Dominique Jeanniot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bull SA
Original Assignee
Bull SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bull SA filed Critical Bull SA
Application granted granted Critical
Publication of DE3664390D1 publication Critical patent/DE3664390D1/de
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • G11B5/678—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer having three or more magnetic layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick
DE8686401561T 1985-07-15 1986-07-11 Anisotropic perpendicular magnetic-recording medium Expired DE3664390D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8510791A FR2584847B1 (fr) 1985-07-15 1985-07-15 Support d'enregistrement perpendiculaire magnetiquement anisotrope

Publications (1)

Publication Number Publication Date
DE3664390D1 true DE3664390D1 (en) 1989-08-17

Family

ID=9321292

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686401561T Expired DE3664390D1 (en) 1985-07-15 1986-07-11 Anisotropic perpendicular magnetic-recording medium

Country Status (5)

Country Link
US (1) US4775576A (de)
EP (1) EP0214878B1 (de)
JP (1) JPS62217424A (de)
DE (1) DE3664390D1 (de)
FR (1) FR2584847B1 (de)

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US4677032A (en) * 1985-09-23 1987-06-30 International Business Machines Corporation Vertical magnetic recording media with multilayered magnetic film structure
US5068147A (en) * 1988-04-28 1991-11-26 Matsushita Electric Industrial Co., Ltd. Soft magnetic thin film comprising alternate layers of iron carbide with either iron, iron nitride or iron carbon-nitride
JPH01295405A (ja) * 1988-05-24 1989-11-29 Nippon Steel Corp 多層合金薄帯および巻磁心
US4904542A (en) * 1988-10-11 1990-02-27 Midwest Research Technologies, Inc. Multi-layer wear resistant coatings
USRE34173E (en) * 1988-10-11 1993-02-02 Midwest Research Technologies, Inc. Multi-layer wear resistant coatings
US5026587A (en) * 1989-10-13 1991-06-25 The James River Corporation Wiping fabric
US5144729A (en) * 1989-10-13 1992-09-08 Fiberweb North America, Inc. Wiping fabric and method of manufacture
US5114905A (en) * 1990-03-08 1992-05-19 Northeastern University Crystal alignment technique for superconductors
JPH04102223A (ja) * 1990-08-20 1992-04-03 Hitachi Ltd 磁気記録媒体及びその製造方法並びに磁気記録装置
JP2684457B2 (ja) * 1991-02-15 1997-12-03 富士写真フイルム株式会社 磁気記録媒体
JPH05135344A (ja) * 1991-05-17 1993-06-01 Tdk Corp 磁気記録媒体
US5633092A (en) * 1991-12-10 1997-05-27 British Technology Group Ltd. Magnetostrictive material
GB9126207D0 (en) * 1991-12-10 1992-02-12 Nat Res Dev Magnetostrictive material
US5605733A (en) * 1992-01-22 1997-02-25 Hitachi, Ltd. Magnetic recording medium, method for its production, and system for its use
JPH06223356A (ja) * 1992-12-03 1994-08-12 Tdk Corp 磁気記録媒体
US5280011A (en) * 1992-04-30 1994-01-18 Northeastern University Alignment technique for anisotropicly conductive crystals utilizing a non-static magnetic field
JPH0676238A (ja) * 1992-07-08 1994-03-18 Fuji Electric Co Ltd 薄膜磁気ヘッド
US5587235A (en) * 1993-02-19 1996-12-24 Hitachi, Ltd. Magnetic recording medium and magnetic recording apparatus
JPH09501790A (ja) * 1994-06-09 1997-02-18 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ 磁気−光学記録媒体
US8119265B2 (en) * 2005-04-01 2012-02-21 Seagate Technology Llc Magneto-elastic anisotropy assisted thin film structure
US7529065B2 (en) * 2005-05-19 2009-05-05 Hitachi Global Storage Technologies Netherlands B.V. Laminated magnetic thin films with weak antiferromagnetic coupling for perpendicular magnetic recording
US7846564B2 (en) * 2005-09-27 2010-12-07 Seagate Technology Llc Perpendicular magnetic recording media with magnetic anisotropy/coercivity gradient and local exchange coupling
US9311948B2 (en) * 2008-12-31 2016-04-12 Seagate Technology Llc Magnetic layering for bit-patterned stack

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350180A (en) * 1967-10-31 Magnetic device with alternating lami- na of magnetic material and non-mag- netic metal on a substrate
FR1358761A (fr) * 1963-05-27 1964-04-17 Matériau magnétique en couches minces magnétiques et non magnétiques
DE1252739B (de) * 1964-03-17 1967-10-26 Siemens Aktiengesellschaft, Berlin und München, München Speicherelement mit gestapelten magnetischen Schichten
US3460968A (en) * 1964-11-04 1969-08-12 Ibm Wear resistant magnetic recording member
US3479156A (en) * 1966-10-20 1969-11-18 Burton Silverplating Co Multilayer magnetic coating
US3516076A (en) * 1967-03-29 1970-06-02 Siemens Ag Memory element employing stacked magnetic layers
US3549428A (en) * 1968-02-26 1970-12-22 Gen Electric Magnetic thin films and method of making
US3829372A (en) * 1972-05-25 1974-08-13 Ibm Multilayer magnetic structure and methods of making same
US4268369A (en) * 1977-07-18 1981-05-19 Ampex Corporation Process of making silicon dioxide films for use as wear resistant coatings in video and digital magnetic recording
US4307156A (en) * 1978-06-13 1981-12-22 Nippon Electric Co., Ltd. Magnetic record member
JPS5774827A (en) * 1980-10-29 1982-05-11 Dainippon Printing Co Ltd Magnetic recording body
JPS5798133A (en) * 1980-12-05 1982-06-18 Matsushita Electric Ind Co Ltd Magnetic recording medium
US4396575A (en) * 1980-12-31 1983-08-02 International Business Machines Corporation Zero magnetostriction Fe-Co-Cr magnetic recording media
DE3212907C2 (de) * 1981-04-06 1985-10-24 Olympus Optical Co., Ltd., Tokio/Tokyo Magnetband sowie Verfahren zu dessen Herstellung
JPS58182129A (ja) * 1982-04-20 1983-10-25 Tdk Corp 磁気記録媒体
US4667032A (en) * 1983-01-21 1987-05-19 Merck Frosst Canada, Inc. Phenothiazone derivatives and analogs
JPS59178617A (ja) * 1983-03-30 1984-10-09 Tdk Corp 磁気記録媒体の製造方法
JPS60638A (ja) * 1983-06-16 1985-01-05 Canon Inc 記録媒体
JP2539349B2 (ja) * 1983-10-14 1996-10-02 株式会社日立製作所 垂直磁気記録媒体
US4687712A (en) * 1983-12-12 1987-08-18 Matsushita Electric Industrial Co., Ltd. Vertical magnetic recording medium

Also Published As

Publication number Publication date
EP0214878A1 (de) 1987-03-18
FR2584847B1 (fr) 1987-10-16
FR2584847A1 (fr) 1987-01-16
US4775576A (en) 1988-10-04
EP0214878B1 (de) 1989-07-12
JPS62217424A (ja) 1987-09-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee