KR910006940A - 광자기 기록 매체 - Google Patents

광자기 기록 매체 Download PDF

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Publication number
KR910006940A
KR910006940A KR1019900012789A KR900012789A KR910006940A KR 910006940 A KR910006940 A KR 910006940A KR 1019900012789 A KR1019900012789 A KR 1019900012789A KR 900012789 A KR900012789 A KR 900012789A KR 910006940 A KR910006940 A KR 910006940A
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KR
South Korea
Prior art keywords
magnetic layer
magneto
rare earth
optical recording
recording medium
Prior art date
Application number
KR1019900012789A
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English (en)
Other versions
KR930009224B1 (ko
Inventor
요시미네 가또
데루히사 시미즈
신지 다까야마
히로시 다나까
Original Assignee
하워드 지. 피거로아
인터내셔널 비지네스 머신즈 코포레이션
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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Publication date
Application filed by 하워드 지. 피거로아, 인터내셔널 비지네스 머신즈 코포레이션 filed Critical 하워드 지. 피거로아
Publication of KR910006940A publication Critical patent/KR910006940A/ko
Application granted granted Critical
Publication of KR930009224B1 publication Critical patent/KR930009224B1/ko

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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
    • 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
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Landscapes

  • Thin Magnetic Films (AREA)

Abstract

내용 없음.

Description

광자기 기록 매체
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 본 발명에 의한 광자기 기록 매체의 일예의 단면도.
제 2 도는 Nd20Co80단일막의 케르 루프도.
제 3 도는 Tb25Fe75단일막의 케르 루프도.

Claims (9)

  1. 희토류 원소로서 경희토류 원소를 주로 포함하고, 또한 상기 경희토류 원소는 Nd와 Pr로 되는 원소군에서 선택한 적어도 일원소인 희토류-천이금속 비정질막으로 되는 제 1 자성층과, 희토류 원소로서 Tb와 Dy로 되는 원소군에서 선택한 적어도 일원소만을 포함하는 희토류-천이금속 비정질막으로 되는 제 2 자성층을 적어도 한층씩 적층해서 이루는 것을 특징으로 하는 광자기 기록 매체.
  2. 제 1 항에 있어서, 제 2 자성층의 두께(t2)에 대한 제 1 자성층의 두께(t1)의 비(t1/t2)가 0.5 이하인 광자기 기록 매체.
  3. 제 1 항에 있어서, 제 2 자성층의 두께(t2)에 대한 제 1 자성층의 두께(t1)의 비(t1/t2)가 0.001 내지 0.2인 광자기 기록 매체.
  4. 제 1 항에 있어서, 제 1 자성층 또는 제 2 자성층에 내식성을 향상시키는 천이금속을 포함시킨 광자기 기록 매체.
  5. 일반식(A1-aBa)1(FebCo1-b)mTn로 나타내어지며 A는 Nd와 Pr로 되는 경희토류 원소에서 선택한 적어도 1원소, B는 중희토류 원소군에서 선택한 적어도 1원소, T는 내식성을 향상시키는 천이금속 원소군에서 선택한 적어도 한 원소이며, 0a0.5, 0b1이며, 원자 %로 10ℓ50, 50m90, 0n15, ℓ+m+n=100을 만족하는 희토류-천이금속 비정질막으로 되는 제 1 자성층과, 일반식 RxMyUz로 나타내어지며, R는 Tb와 Dy로 되는 원소군에서 선택한 적어도 1원소, U는 내식성을 향상시키는 천이금속 원소군에서 선택한 적어도 1원소이며, 원자 %로 15x35, 65y85, 0z15, x+y+z=100을 만족하는 희토류-천이금속 비정질막으로 되는 제 2 자성층을 적어도 1층씩 적층해서 이루는 광자기 기록 매체.
  6. 제 5 항에 있어서, 제 2 자성층의 두께(t2)에 대한 제 1 자성층의 두께(t1)의 비(t1/t2)가 0.5 이하인 광자기 기록 매체.
  7. 제 5 항에 있어서, 제 2 자성층의 두께(t2)에 대한 제 1 자성층의 두께(t1)의 비(t1/t2)가 0.001 내지 0.2인 광자기 기록 매체.
  8. 제 5 항에 있어서, 상기 내식성을 향상시키는 천이금속 원소군은 Ti, Zr, V, Nb, Ta, Cr, Mo, W, Pd, Pt, Au, Al로 이루는 광자기 기록 매체.
  9. 제 5 항에 있어서, 상기 중희토류 원소군은 Tb, Dy, Gd, Ho, Er로 이루는 광자기 기록 매체.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900012789A 1989-09-20 1990-08-20 광자기 기록 매체 KR930009224B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1242422A JP2646398B2 (ja) 1989-09-20 1989-09-20 光磁気記録媒体
JP242422 1989-09-20

Publications (2)

Publication Number Publication Date
KR910006940A true KR910006940A (ko) 1991-04-30
KR930009224B1 KR930009224B1 (ko) 1993-09-24

Family

ID=17088880

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900012789A KR930009224B1 (ko) 1989-09-20 1990-08-20 광자기 기록 매체

Country Status (10)

Country Link
US (1) US5030512A (ko)
EP (1) EP0419169B1 (ko)
JP (1) JP2646398B2 (ko)
KR (1) KR930009224B1 (ko)
CN (1) CN1019242B (ko)
CA (1) CA2017300C (ko)
DE (1) DE69020992T2 (ko)
GB (1) GB9014399D0 (ko)
HK (1) HK24096A (ko)
MY (1) MY106198A (ko)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029874A1 (de) * 1990-09-21 1992-03-26 Basf Ag Magnetooptische datenplatte mit pt-haltiger leseschicht
JPH0690976B2 (ja) * 1990-10-05 1994-11-14 インターナショナル・ビジネス・マシーンズ・コーポレーション 光磁気記録媒体
JPH06236587A (ja) * 1992-05-19 1994-08-23 Nikon Corp 再生専用型の光磁気ディスク、その再生方法 及び再生装置
JPH06309710A (ja) * 1993-04-27 1994-11-04 Nikon Corp 光磁気記録媒体
US6423430B1 (en) * 1995-07-17 2002-07-23 Samsung Electronics Co., Ltd. Magneto-optical recording medium for short wavelength
US5665465A (en) * 1995-11-06 1997-09-09 Lucent Technologies Inc. Article comprising exchange-coupled magnetic materials
JP4337209B2 (ja) * 2000-02-22 2009-09-30 日立金属株式会社 永久磁石薄膜およびその製造方法
TW560095B (en) * 2001-04-02 2003-11-01 Canon Kk Magnetoresistive element, memory element having the magnetoresistive element, and memory using the memory element
JP2003091801A (ja) * 2001-09-17 2003-03-28 Toshiba Corp 磁気記録装置及び磁気記録媒体
JP2006024732A (ja) * 2004-07-08 2006-01-26 Fujitsu Ltd 磁性膜並びにハードディスクドライブ用記録再生ヘッドおよび固体デバイス

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150946B (en) * 1983-11-05 1987-08-19 Canon Kk Magneto-optical recording medium
JPH0619859B2 (ja) * 1984-02-16 1994-03-16 株式会社ニコン 光磁気記録媒体
JPS6124041A (ja) * 1984-07-13 1986-02-01 Canon Inc 光学的磁気記録媒体
JPH0782670B2 (ja) * 1985-07-12 1995-09-06 株式会社日立製作所 光磁気記録媒体
FR2601175B1 (fr) * 1986-04-04 1993-11-12 Seiko Epson Corp Cible de pulverisation cathodique et support d'enregistrement utilisant une telle cible.
JPS6430344A (en) * 1987-07-27 1989-02-01 Matsushita Electric Ind Co Ltd Error corrector
JPS6430345A (en) * 1987-07-27 1989-02-01 Nec Corp Synchronizing detecting circuit
JPH01124131A (ja) * 1987-11-09 1989-05-17 Hitachi Ltd 光磁気記録媒体
JPH01130344A (ja) * 1987-11-16 1989-05-23 Hitachi Ltd 光磁気記録媒体
JPH01169758A (ja) * 1987-12-24 1989-07-05 Hitachi Ltd 光磁気記録媒体
JP2561111B2 (ja) * 1988-01-28 1996-12-04 富士写真フイルム株式会社 光磁気記録媒体
JPH01237945A (ja) * 1988-03-18 1989-09-22 Canon Inc 光磁気記録媒体

Also Published As

Publication number Publication date
EP0419169A2 (en) 1991-03-27
KR930009224B1 (ko) 1993-09-24
CA2017300C (en) 1994-05-17
EP0419169A3 (en) 1992-12-16
HK24096A (en) 1996-02-16
DE69020992T2 (de) 1996-04-04
CN1050456A (zh) 1991-04-03
JPH03108144A (ja) 1991-05-08
US5030512A (en) 1991-07-09
EP0419169B1 (en) 1995-07-19
GB9014399D0 (en) 1990-08-22
JP2646398B2 (ja) 1997-08-27
MY106198A (en) 1995-03-31
CN1019242B (zh) 1992-11-25
CA2017300A1 (en) 1991-03-20
DE69020992D1 (de) 1995-08-24

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