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
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)
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) |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Family Cites Families (13)
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 |
-
1985
- 1985-09-30 US US06/781,618 patent/US4649519A/en not_active Expired - Lifetime
-
1986
- 1986-07-14 JP JP61163938A patent/JPS6280846A/ja active Granted
- 1986-08-05 DE DE8686110794T patent/DE3669941D1/de not_active Expired - Fee Related
- 1986-08-05 EP EP86110794A patent/EP0217067B1/de not_active Expired
-
1991
- 1991-04-05 SG SG258/91A patent/SG25891G/en unknown
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 |