KR920010562A - 광 자기기록 매체 - Google Patents

광 자기기록 매체 Download PDF

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Publication number
KR920010562A
KR920010562A KR1019910017041A KR910017041A KR920010562A KR 920010562 A KR920010562 A KR 920010562A KR 1019910017041 A KR1019910017041 A KR 1019910017041A KR 910017041 A KR910017041 A KR 910017041A KR 920010562 A KR920010562 A KR 920010562A
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KR
South Korea
Prior art keywords
magnetic layer
layer
recording medium
magnetic
layers
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KR1019910017041A
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English (en)
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KR950003184B1 (ko
Inventor
다쯔야 후까미
가즈히꼬 쯔쯔미
류시 도꾸나까
요시유끼 나까기
Original Assignee
시기 모리야
미쯔비시덴끼 가부시끼가이샤
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.)
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Priority claimed from JP32427290A external-priority patent/JP2712829B2/ja
Priority claimed from JP2324275A external-priority patent/JP2757560B2/ja
Priority claimed from JP2324276A external-priority patent/JPH04192138A/ja
Priority claimed from JP2324271A external-priority patent/JPH04192135A/ja
Application filed by 시기 모리야, 미쯔비시덴끼 가부시끼가이샤 filed Critical 시기 모리야
Publication of KR920010562A publication Critical patent/KR920010562A/ko
Application granted granted Critical
Publication of KR950003184B1 publication Critical patent/KR950003184B1/ko

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    • 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
    • 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
    • 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
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • 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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10506—Recording by modulating only the light beam of the transducer

Abstract

내용 없음.

Description

광 자기기록 매체
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 제1의 실시예에 의한 광자기 기록매체의 구성도,
제2도는 직접 오버라이트후의 소거비의 제5자성층의 희토류(RE) 조성의존성을 도시한 도면,
제3도는 제1자성층과 제2자성층 사이의 경계면자벽 에너지의 온도의존성을 도시한 도면.

Claims (9)

  1. 기판상에 수직자기 이방성을 갖는 제1자성층(4)에서 제4자성층(7)까지의 4층이 적층되고, 각각 접하는 층은 교환결합력으로 결합해 있으며, 광강도 변조방식에 의해 직접 오버라이트가 가능한 광자기 기록매체에 있어서, 제1자성층(4)와 제2자성층(5)의 사이에 희토류 부격자 자화가 우세한 희토류-천이금속합금으로 이루어지는 제5의 층(8)을 갖는 광 자기기록 매체.
  2. 특허청구 범위 제1항에 있어서, 상기 제5의 층(8)은 GdFe, DyFeCo, GdFeCo, GdCo, HoCo 중에서 선택된 하나로 이루어지는 광 자기기록 매체.
  3. 기판상에 수직자기이방성을 갖는 제1자성층(14)에서 제4성층(17)까지의 4층이 적층되고, 각각이 인접하는 층은 서로 교환결합되어 있으며, 광강도변조방식에 의해 직접 오버라이트가 가능한 광자기 기록매체에 있어서, 광빔(1)이 최초에 입사하는 제1자성층에 인접하며, 또한 광의 조사방향에 Nd를 함유하는 희토류-천이금속합금막으로 이루어지는 층(18)을 갖고, 이 층이 제1자성층과 교환결합하고 있는 광 자기기록 매체.
  4. 특허청구의 범위 제3항에 있어서, 상기 Nd를 함유하는 희토류-천이금속합금막이 NdTbFeCo, NdDyFeCo, NdGdFeCo이고, Nd의 FeCO에 대한 첨가량이 20at%이하인 광 자기기록 매체.
  5. 수직자기이방성을 갖는 제1자성층(14)에서 제4자성층(17)까지의 4층이 적층되고, 각각이 인접하는 층은 서로 교환결합되어 있으며, 광강도 변조방식에 의해 직접 오버라이트 가능한 광 자기기록 매체에 있어서, 광빔이 최초에 입사하는 제1자성층에 인접하며, 또한 광의 조사방향에 Pt 또는 Pd와 Co를 교대로 적층한 자성층을 갖고 이 층이 제1자성층과 교환결합하고 있는 광 자기기록 매체.
  6. 특허청구의 범위 제5항에 있어서, 상기 Pt 또는 Pd와 Co를 교대로 적층한 자성층의 큐리온도가 제1자성층의 큐리온도보다 낮은 광 자기기록 매체.
  7. 기판상에 수직자기 이방성을 갖는 제1자성층(4)에서 제4자성층(28)까지의 4층이 적층되고, 각각이 인접하는 층은 서로 교환결합되어 있으며, 광변조방식에 의해 직접 오버라이트가 가능한 광 자기기록 매체에 있어서, 제4층(28)상에 교환결합된 제5의 자성층(29)를 마련하여 상기 제4 및 제5의 자성층이 희토류와 천이금속의 합금으로 이루어지고, 실온에서 제4층이 천이금속 우세이며, 또한 제5층이 희토류 우세인 광 자기기록 매체.
  8. 기판상에 수직자기이방성을 갖는 제1자성층(4)에서 제4자성층(7)까지의 4층이 적층되고, 각각이 인접하는 층은 서로 교환결합되어 있으며, 광강도 변조방식에 의해 직접 오버라이트가 가능한 광 자기기록 매체에 있어서, 제4층상에 교환결합해 있지 않는 제5의 자성층(38, 39)를 마련한 광 자기기록 매체.
  9. 특허청구의 범위 제8항에 있어서, 상기 제5의 자성층이 300℃이상의 큐리온도를 갖고 있는 광 자기기록 매체.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019910017041A 1990-11-26 1991-09-30 광자기 기록매체 KR950003184B1 (ko)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP32427290A JP2712829B2 (ja) 1990-11-26 1990-11-26 光磁気記録媒体
JP90-324275 1990-11-26
JP2324275A JP2757560B2 (ja) 1990-11-26 1990-11-26 光磁気記録媒体
JP90-324271 1990-11-26
JP2324276A JPH04192138A (ja) 1990-11-26 1990-11-26 光磁気記録媒体
JP2324271A JPH04192135A (ja) 1990-11-26 1990-11-26 光磁気記録媒体
JP90-324272 1990-11-26
JP90-324276 1990-11-26

Publications (2)

Publication Number Publication Date
KR920010562A true KR920010562A (ko) 1992-06-26
KR950003184B1 KR950003184B1 (ko) 1995-04-01

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Application Number Title Priority Date Filing Date
KR1019910017041A KR950003184B1 (ko) 1990-11-26 1991-09-30 광자기 기록매체

Country Status (3)

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US (1) US5191561A (ko)
EP (2) EP0487847A1 (ko)
KR (1) KR950003184B1 (ko)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361248A (en) * 1992-06-01 1994-11-01 Eastman Kodak Company Direct overwrite magneto-optical storage medium not requiring an initialization magnet
JP2854191B2 (ja) * 1992-06-19 1999-02-03 シャープ株式会社 記録媒体
WO1995030986A1 (fr) * 1994-05-10 1995-11-16 Hitachi Maxell, Ltd. Support d'enregistrement magneto-optique, procede et appareil d'enregistrement et de reproduction
JPH09167388A (ja) * 1995-10-11 1997-06-24 Canon Inc 光磁気記録媒体、該媒体を用いた情報記録再生装置及び情報記録再生方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62241154A (ja) * 1986-04-14 1987-10-21 Seiko Epson Corp 光記録媒体の製造方法
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
JP2543509B2 (ja) * 1986-09-12 1996-10-16 キヤノン株式会社 光磁気記録媒体の製造方法
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
JP2630976B2 (ja) * 1988-03-19 1997-07-16 富士通株式会社 光磁気記録媒体
CA1326547C (en) * 1988-07-13 1994-01-25 Masahiko Kaneko Thermomagnetic recording method
JP2558365B2 (ja) * 1988-12-27 1996-11-27 キヤノン株式会社 光磁気記録媒体
JP2685888B2 (ja) * 1989-04-07 1997-12-03 シャープ株式会社 磁気光学記録媒体

Also Published As

Publication number Publication date
EP0487847A1 (en) 1992-06-03
EP0750295A3 (en) 1997-01-08
US5191561A (en) 1993-03-02
EP0750295A2 (en) 1996-12-27
KR950003184B1 (ko) 1995-04-01

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