DE3669941D1 - Thermisches magnetooptisches medium mit vormagnetisierungsschicht. - Google Patents

Thermisches magnetooptisches medium mit vormagnetisierungsschicht.

Info

Publication number
DE3669941D1
DE3669941D1 DE8686110794T DE3669941T DE3669941D1 DE 3669941 D1 DE3669941 D1 DE 3669941D1 DE 8686110794 T DE8686110794 T DE 8686110794T DE 3669941 T DE3669941 T DE 3669941T DE 3669941 D1 DE3669941 D1 DE 3669941D1
Authority
DE
Germany
Prior art keywords
thermal
magnetizing layer
magnetooptic medium
magnetooptic
medium
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 - Fee Related
Application number
DE8686110794T
Other languages
English (en)
Inventor
Shu Shen Sun
Curt William Laumann
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE3669941D1 publication Critical patent/DE3669941D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G19/00—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography
    • G03G19/005—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography where the image is formed by selective demagnetizing, e.g. thermomagnetic recording
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/16—Layers for recording by changing the magnetic properties, e.g. for Curie-point-writing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
DE8686110794T 1985-09-30 1986-08-05 Thermisches magnetooptisches medium mit vormagnetisierungsschicht. Expired - Fee Related DE3669941D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/781,618 US4649519A (en) 1985-09-30 1985-09-30 Self biasing thermal magneto-optic medium

Publications (1)

Publication Number Publication Date
DE3669941D1 true DE3669941D1 (de) 1990-05-03

Family

ID=25123353

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686110794T Expired - Fee Related DE3669941D1 (de) 1985-09-30 1986-08-05 Thermisches magnetooptisches medium mit vormagnetisierungsschicht.

Country Status (5)

Country Link
US (1) US4649519A (de)
EP (1) EP0217067B1 (de)
JP (1) JPS6280846A (de)
DE (1) DE3669941D1 (de)
SG (1) SG25891G (de)

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JPS60236137A (ja) * 1984-05-08 1985-11-22 Nippon Kogaku Kk <Nikon> 同時消録型光磁気記録方式並びにそれに使用する記録装置及び記録媒体
US5458987A (en) * 1985-06-11 1995-10-17 Nikon Corporation Multilayered magnetooptical recording medium
US5239524A (en) * 1985-06-11 1993-08-24 Nikon Corporation Over write capable magnetooptical recording method, and magnetooptical recording apparatus and medium used therefor
US4794560A (en) * 1985-09-30 1988-12-27 International Business Machines Corporation Eraseable self biasing thermal magneto-optic medium
US4882718A (en) * 1986-03-07 1989-11-21 Movid Information Technology, Inc. Single-head, direct overwrite magneto-optic system and method
US5528564A (en) * 1986-03-07 1996-06-18 Movid Information Technology, Inc. Direct overwrite magneto-optic system for strip erasing and recording elongated domains
US5184335A (en) * 1986-03-07 1993-02-02 Movid Information Technology, Inc. Method and system for erasing previously recorded domains in a magneto-optic recording medium
ATE216528T1 (de) * 1986-07-08 2002-05-15 Canon Kk Gerät und system zur aufzeichnung auf einem magnetooptischen aufzeichnungsmedium
US6028824A (en) * 1986-07-08 2000-02-22 Canon Kabushiki Kaisha Magnetooptical recording medium allowing overwriting with two or more magnetic layers
KR960003420B1 (ko) * 1986-07-08 1996-03-13 캐논 가부시끼가이샤 2층이상의 자성막을 가지고 중복기록이 가능한 광자기 기록매체 및 그의 매체를 사용한 기록방법
CA1322408C (en) * 1986-08-20 1993-09-21 Tomiji Tanaka Thermomagnetic recording method applying power modulated laser on a magnetically coupled double layer structure of perpendicular anisotropy film
US5014252A (en) * 1986-10-08 1991-05-07 Nikon Corporation Over write capable magnetooptical recording method using two beams, and magnetooptical recording apparatus therefor
JP2570270B2 (ja) * 1986-10-08 1997-01-08 株式会社ニコン ツービームによる光磁気記録方法及び装置
JPS63249951A (ja) * 1987-04-03 1988-10-17 Mitsubishi Electric Corp 光磁気記録情報担体
JPS63249953A (ja) * 1987-04-03 1988-10-17 Mitsubishi Electric Corp 光磁気記録再生装置
AU600576B2 (en) * 1987-04-24 1990-08-16 Sony Corporation Thermomagnetic recording method applying power modulated laser on a magnetically coupled multi-layer structure of perpendicular anisotropy magnetic film
JP2754537B2 (ja) * 1987-05-18 1998-05-20 株式会社ニコン 光磁気記録媒体並びにそれを使用したビット形成方法
JPS63291237A (ja) * 1987-05-21 1988-11-29 Mitsubishi Electric Corp 光磁気記録再生用情報担体装置
US5020040A (en) * 1987-06-24 1991-05-28 Digital Equipment Corporation Overwriting system for magneto-optical recording with self timing track
JPS6430042A (en) * 1987-07-24 1989-01-31 Matsushita Electric Ind Co Ltd Magneto-optical memory device
US5187694A (en) * 1987-08-21 1993-02-16 Kabushiki Kaisha Toshiba Magneto-optical recording medium comprising recording layer and thermal bias layer, and method for recording, erasing and overwriting on the medium
JP2828993B2 (ja) * 1987-08-21 1998-11-25 株式会社東芝 光磁気記録媒体及びそれを用いた情報記録方法
KR970002341B1 (ko) * 1987-11-30 1997-03-03 소니 가부시끼가이샤 자기 광 기록 매체의 신호 재생 방법
JPH01149246A (ja) * 1987-12-04 1989-06-12 Sony Corp 光磁気記録媒体
US4893910A (en) * 1988-03-16 1990-01-16 Hewlett-Packard Company Magneto-optical recording system having medium with domainless control layer
DE3811374A1 (de) * 1988-04-05 1989-10-19 Siemens Ag Datenspeichersystem und verfahren zu seiner herstellung
DE3811375A1 (de) * 1988-04-05 1989-10-19 Siemens Ag Datenspeichersystem
DE3914121A1 (de) * 1988-04-28 1989-11-16 Nikon Corp Ueberschreibbarer magnetooptischer aufzeichnungstraeger
US5237548A (en) * 1988-06-01 1993-08-17 Hoechst Aktiengesellschaft Magneto-optic recording structure and method
EP0348198A3 (de) * 1988-06-23 1991-01-16 Kabushiki Kaisha Toshiba Magneto-optisches Verfahren zur Aufzeichnung und Löschung von Informationen und magneto-optischer Informationsaufzeichnungsträger zur Ausführung dieses Verfahrens
JP2712312B2 (ja) * 1988-06-24 1998-02-10 株式会社ニコン オーバーライト可能な光磁気記録媒体
WO1990002400A1 (en) * 1988-08-24 1990-03-08 Mitsubishi Denki Kabushiki Kaisha Magnetooptical recording medium and method of producing the same
US5175714A (en) * 1988-09-30 1992-12-29 Kabushiki Kaisha Toshiba Method of magneto-optically recording/erasing information and magneto-optical information storage medium including recording and bias layers satisfying certain conditions
JPH0296957A (ja) * 1988-10-03 1990-04-09 Mitsubishi Electric Corp 光磁気記録媒体の消去記録方法
US5040166A (en) * 1988-10-21 1991-08-13 Oki Electric Industry Co., Ltd. Magneto-optical recording medium having a reflective film of Ag and Mn or Ag, Mn and Sn
JPH02158939A (ja) * 1988-12-12 1990-06-19 Nikon Corp オーバーライト可能な光磁気記録媒体
US5239534A (en) * 1988-12-12 1993-08-24 Nikon Corporation Multi-layer over write capable magnetooptical recording medium
DE3904611A1 (de) * 1989-02-16 1990-08-23 Hoechst Ag Magnetooptische schicht und verfahren zu ihrer herstellung
US5240784A (en) * 1989-03-01 1993-08-31 Nikon Corporation Magnetooptical recording medium
US5189649A (en) * 1989-05-24 1993-02-23 Hewlett-Packard Company Method and apparatus for directly overwriting magnetooptic data storage media
US5272684A (en) * 1989-08-01 1993-12-21 Mitsubishi Denki Kabushiki Kaisha Information recording method and information recording apparatus for magneto-optic recording information medium
US5087532A (en) * 1989-08-01 1992-02-11 Minnesota Mining And Manufacturing Company Direct-overwrite magneto-optic media
US5512366A (en) * 1989-11-14 1996-04-30 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording medium and apparatus
JP3015475B2 (ja) * 1990-01-31 2000-03-06 株式会社東芝 光磁気記録方法及びそれに使用される光磁気記録媒体
US5604046A (en) * 1990-02-23 1997-02-18 Canon Kabushiki Kaisha Magneto-optical recording medium and a method using the same
EP0470546B1 (de) * 1990-08-07 1998-11-04 Hitachi Maxell Ltd. Magnetooptischer Aufzeichnungsträger
US5239504A (en) * 1991-04-12 1993-08-24 International Business Machines Corporation Magnetostrictive/electrostrictive thin film memory
DE4137427C1 (de) * 1991-11-14 1993-01-14 Hoechst Ag, 6230 Frankfurt, De
US5361248A (en) * 1992-06-01 1994-11-01 Eastman Kodak Company Direct overwrite magneto-optical storage medium not requiring an initialization magnet
US5463578A (en) * 1994-09-22 1995-10-31 International Business Machines Corporation Magneto-optic memory allowing direct overwrite of data
US6724674B2 (en) * 2000-11-08 2004-04-20 International Business Machines Corporation Memory storage device with heating element
US7397624B2 (en) 2003-11-06 2008-07-08 Seagate Technology Llc Transducers for ferroelectric storage medium

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Publication number Priority date Publication date Assignee Title
US3651504A (en) * 1969-10-17 1972-03-21 Sperry Rand Corp Magneto-optic information storage apparatus
BE760026A (fr) * 1969-12-10 1971-06-08 Philips Nv Memoire
US3710352A (en) * 1970-03-13 1973-01-09 Micro Bit Corp High speed-large storage capability electron beam accessed memory method and apparatus
US3680065A (en) * 1970-05-25 1972-07-25 Ibm Nonvolatile magneto-optical memory element and a method of writing thereon
DE2043766A1 (de) * 1970-09-03 1972-03-09 Siemens Ag Verfahren und Anordnung zum Speichern von Informationen in einem magnetooptischen Speicher
US3711841A (en) * 1971-12-22 1973-01-16 Bell Telephone Labor Inc Single wall domain arrangement
US3710353A (en) * 1971-12-30 1973-01-09 Ibm Thermal capacitative-ferroelectric storage device
US3949387A (en) * 1972-08-29 1976-04-06 International Business Machines Corporation Beam addressable film using amorphous magnetic material
JPS5329415B2 (de) * 1973-03-05 1978-08-21
US3982234A (en) * 1974-07-01 1976-09-21 International Business Machines Corporation Hard-magnetic film overlay apparatus and method for magnetic mobile domain control
JPS58108045A (ja) * 1981-12-21 1983-06-28 Fuji Xerox Co Ltd 光磁気記録媒体および光磁気記録装置
JPS60126775A (ja) * 1983-12-13 1985-07-06 Matsushita Electric Ind Co Ltd 物体検出方法
JP2521908B2 (ja) * 1985-06-11 1996-08-07 株式会社ニコン オ―バ―ライト可能な光磁気記録方法、それに使用される光磁気記録装置及び光磁気記録媒体、並びに変調方法、変調装置及び光磁気記録媒体

Also Published As

Publication number Publication date
EP0217067A2 (de) 1987-04-08
JPS6280846A (ja) 1987-04-14
EP0217067B1 (de) 1990-03-28
SG25891G (en) 1991-06-21
US4649519A (en) 1987-03-10
EP0217067A3 (en) 1988-07-06
JPH0434217B2 (de) 1992-06-05

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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