DE68926826D1 - Zweischichtiger magneto-optischer Aufzeichnungsträger mit einer Schicht niedriger Koerzitivkraft, bestehend aus Gd und mindestens Tb oder Dy - Google Patents

Zweischichtiger magneto-optischer Aufzeichnungsträger mit einer Schicht niedriger Koerzitivkraft, bestehend aus Gd und mindestens Tb oder Dy

Info

Publication number
DE68926826D1
DE68926826D1 DE68926826T DE68926826T DE68926826D1 DE 68926826 D1 DE68926826 D1 DE 68926826D1 DE 68926826 T DE68926826 T DE 68926826T DE 68926826 T DE68926826 T DE 68926826T DE 68926826 D1 DE68926826 D1 DE 68926826D1
Authority
DE
Germany
Prior art keywords
layer
recording medium
optical recording
coercive force
low coercive
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
DE68926826T
Other languages
English (en)
Other versions
DE68926826T2 (de
Inventor
Tadashi Kobayashi
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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP3753388A external-priority patent/JPH01213847A/ja
Priority claimed from JP63055055A external-priority patent/JP2642656B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of DE68926826D1 publication Critical patent/DE68926826D1/de
Publication of DE68926826T2 publication Critical patent/DE68926826T2/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
    • 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
    • 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
DE1989626826 1988-02-22 1989-02-20 Zweischichtiger magneto-optischer Aufzeichnungsträger mit einer Schicht niedriger Koerzitivkraft, bestehend aus Gd und mindestens Tb oder Dy Expired - Fee Related DE68926826T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3753388A JPH01213847A (ja) 1988-02-22 1988-02-22 光磁気記録媒体
JP63055055A JP2642656B2 (ja) 1988-03-10 1988-03-10 光磁気記録媒体

Publications (2)

Publication Number Publication Date
DE68926826D1 true DE68926826D1 (de) 1996-08-22
DE68926826T2 DE68926826T2 (de) 1996-12-12

Family

ID=26376659

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1989626826 Expired - Fee Related DE68926826T2 (de) 1988-02-22 1989-02-20 Zweischichtiger magneto-optischer Aufzeichnungsträger mit einer Schicht niedriger Koerzitivkraft, bestehend aus Gd und mindestens Tb oder Dy

Country Status (2)

Country Link
EP (1) EP0330394B1 (de)
DE (1) DE68926826T2 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094925A (en) * 1989-06-30 1992-03-10 Sharp Kabushiki Kaisha Opto-magnetic recording medium
JP2574911B2 (ja) * 1990-01-10 1997-01-22 シャープ株式会社 光磁気記録方法
DE4029874A1 (de) * 1990-09-21 1992-03-26 Basf Ag Magnetooptische datenplatte mit pt-haltiger leseschicht
DE4039919A1 (de) * 1990-12-14 1992-06-17 Basf Ag Magnetooptische datenplatte mit korrosionsstabiler magnetooptischer doppelschicht
JPH06243522A (ja) * 1993-02-16 1994-09-02 Nikon Corp 光磁気ディスク及びその再生方法
JP2664330B2 (ja) * 1993-09-02 1997-10-15 富士通株式会社 光磁気記録媒体
DE19852368A1 (de) 1998-11-13 2000-05-25 Forschungszentrum Juelich Gmbh Markierungseinrichtung
JP2002197630A (ja) * 2000-12-25 2002-07-12 Toshiba Corp 垂直磁気記録媒体及び磁気記録再生装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5778652A (en) * 1980-11-01 1982-05-17 Daido Steel Co Ltd Thermal magnetic recording carrier and thermal magnetic recording system
JPH061564B2 (ja) * 1984-02-22 1994-01-05 株式会社ニコン 光磁気記録媒体
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
ATE172047T1 (de) * 1986-07-08 1998-10-15 Canon Kk Magnetoptisches aufzeichnungsmedium mit der möglichkeit des überschreibens mit zwei oder mehr magnetschichten und dieses medium verwendende aufzeichnungsmethode
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
EP0305185B1 (de) * 1987-08-25 1992-11-25 Canon Kabushiki Kaisha Optomagnetischer Aufzeichnungsträger mit einer Mehrzahl von austauschgekoppelten magnetischen Schichten

Also Published As

Publication number Publication date
EP0330394A2 (de) 1989-08-30
EP0330394B1 (de) 1996-07-17
DE68926826T2 (de) 1996-12-12
EP0330394A3 (en) 1990-05-16

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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