KR950702733A - 자기-광학 기록 재료 시스템(magneto-optical recording materials system) - Google Patents

자기-광학 기록 재료 시스템(magneto-optical recording materials system) Download PDF

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KR950702733A
KR950702733A KR1019950700254A KR19950700254A KR950702733A KR 950702733 A KR950702733 A KR 950702733A KR 1019950700254 A KR1019950700254 A KR 1019950700254A KR 19950700254 A KR19950700254 A KR 19950700254A KR 950702733 A KR950702733 A KR 950702733A
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밀러 조셉
폴 애쉴리 피어슨 드렉
죠지 핏쳐 필립
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아이엔 카미첼 위샤르트
존슨 맛쎄이 퍼블릭 리미티드 캄파니
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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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
    • H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
    • H01F10/325—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being noble metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
    • H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
    • H01F10/3268—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn
    • H01F10/3281—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn only by use of asymmetry of the magnetic film pair itself, i.e. so-called pseudospin valve [PSV] structure, e.g. NiFe/Cu/Co
    • 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
    • G11B11/10517—Overwriting or erasing
    • G11B11/10519—Direct overwriting, i.e. performing erasing and recording using the same transducing means
    • G11B11/10521—Direct overwriting, i.e. performing erasing and recording using the same transducing means using a single light spot
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
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    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12632—Four or more distinct components with alternate recurrence of each type component
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Abstract

그 안에서 교환 결합이 달성가능한 본 재료 시스템은 데이타의 직접 중복기입을 허용하는 포텐셜을 가지고, 독립적으로 제어된 포화보자력과 퀴리온도를 가지는 백금과 코발트의 적어도 두 다층 필름으로 구성된다.

Description

자기-광학 기록 재료 시스템(MAGNETO-OPTICAL RECORDING MATERIALS SYSTEM)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 실시예 4에 있어서 이중층 다층 구조에 대한 필름 측면 광학 검색으로부터의 극 커어(Kerr) 곡선을 나타내는 도표.
제2도는 실시예 5에 있어서 극 커어 곡선을 나타내는 도표.
제3A도는 실시예 6에 있어서 필름 측면에 대한 기판 광학 검색을 통한 극 커어 곡선을 나타내는 도표.
제3B도는 실시에 6에 있어서 필름 측면에 대한 기판 광학 검색을 통한 극 커어 곡선을 나타내는 도표.
제4도는 실시예 7에 있어서 주/부 실온 극 커어 곡선을 나타내는 도표.
제5A도는 실시예 7에 있어서 주/부 극 커어 곡선을 나타내는 도표.
제5B도는 실시에 7에 있어서 주/부 극 커어 곡선을 나타내는 도표.

Claims (29)

  1. 기판 재료와 적어도 두개의 백금 및 코발트 다층 필름으로 구성되는, 자기-광학 기록에 적합하고 데이타의 직접 중복기입을 허용하는 포텐셜을 가진 재료 시스템에 있어서, 다층 결계면에 하나 또는 양 다층의 Pt층 또는 분리-용착된 재료로 구성되는 스페이서가 구비되며, 상기 다층 필름 중 하나는 상대적으로 높은 실온 포화 보자력 (Hc)과 낮은 퀴리온도 (Tc)를 가지는 기억층이고, 상기 다층 필름 중 하나는 상대적으로 낮은 실온 포화보자력과 높은 퀴리온도를 가지는 기준층이며, 두 다층 필름 사이의 포화보자력과 퀴리온도의 차이가 직접 중복기입 공정을 허용하기에 충분한 것을 특징으로 하는 재료 시스템.
  2. 제1항에 있어서, Hc(기억층)에서 Hc(기준층)을 뺀 값이 σw/[2Ms(기억층) h(기억층)]+σw/[2Ms(기준층) h(기준층)] 보다 크다는 조건하에서, 기준층의 Hc가 0.5 내지 10kOe인 반면 기억층의 Hc가 2내지 15kOe이며, 단 상기 식에서 σw는 교환결함강도이고, Ms는 포화자화이며, h는 다층두께인 것을 특징으로 하는 재료 시스템.
  3. 제2항에 있어서, 기억층의 Hc가 3-10kOe인 것을 특징으로 하는 재료 시스템.
  4. 제3항에 있어서, 기억층의 Hc가 3-8kOe인 것을 특징으로 하는 재료 시스템.
  5. 제2항에 있어서, 기억층의 Hc가 1-6kOe인 것을 특징으로 하는 재료 시스템.
  6. 제5항에 있어서, 기억층의 Hc가 1.5-4kOe인 것을 특징으로 하는 재료 시스템.
  7. 제1항 내지 제6항 중 어느 한 항에 있어서. 기준층의 Tc가 기여층의 Tc보다 75℃ 내지 100℃ 만큼 더 크다는 조건하에서 기준층의 Tc가 175℃ 내지 570℃인 반면 기억층의 Tc가 100℃에서 400℃인 것을 특징으로 하는 재료 시스템.
  8. 제7항에 있어서, 기준층의 Tc가 기억층의 Tc보다 177℃ 이상 더 큰 것을 특징으로 하는 재료 시스템.
  9. 제7항 또는 제8항에 있어서, 기억층의 Tc가 150℃ 내지 300℃인 것을 특징으로 하는 재료 시스템.
  10. 제9항에 있어서, 기억층의 Tc가 150℃에서 200℃인 것을 특징으로 하는 재료 시스템.
  11. 제7항 또는 제8항에 있어서, 기준층의 Tc가 250℃ 내지 500℃인 것을 특징으로 하는 재료 시스템.
  12. 제11항에 있어서, 기준층의 Tc가 200℃ 내지 400℃인 것을 특징으로 하는 재료 시스템
  13. 제1항 내지 제12항 중 어느 한 항에 있어서, 다층 경계면에 있는 스페이서가 하나 또는 양 다층의 Pt층으로 구성되는 것을 특징으로 하는 재료 시스템.
  14. 제1항 내지 제13항 중 어느 한 항에 있어서, 다층 경계면에 있는 스페이서가 분리-용착된 재료로 구성되는 것을 특징으로 하는 재료 시스템.
  15. 제14항에 있어서, 분리-용착된 재료가 백금 또는 기타 금속 또는 절연 물질 또는 조합 재료인 것을 특징으로 하는 재료 시스템.
  16. 제15항에 있어서, 분리-용착된 재료가 백금으로 된 것을 특징으로 하는 재료 시스템.
  17. 제1항 내지 제16항 중 어느 한 항에 있어서, 스페이서가 50Å까지의 평균 두께로 된 것을 특징으로 하는 재료 시스템.
  18. 제17항에 있어서, 스페이서가 부-단층 두께가 25Å인 평균 두께로 된 것을 특징으로 하는 재료 시스템.
  19. 제1항 내지 제18항 중 어느 한 항에 있어서, 기판과 인접한 Pt/Co 다층 필름 사이에 백금 또는 기타 금속 또는 절연 재료 또는 조합 재료로 된 중간층이 구비된 것을 특징으로 하는 재료 시스템.
  20. 제19항에 있어서, 중간층이 백금으로 된 것을 특징으로 하는 재료 시스템.
  21. 제20항에 있어서, 중간층이 50Å에 이르는 평균 두께로 된 것을 특징으로 하는 재료 시스템.
  22. 제21항에 있어서, 중간층이 부-단층 두께가 20Å인 평균 두께로 된 것을 특징으로 하는 재료 시스템.
  23. 제1항 내지 제22항 중 어느 한 항에 있어서, 각각의 코발트 층이 2 내지 5Å의 두께를 가진 것을 특징으로 하는 재료 시스템.
  24. 제1항 내지 제23항 중 어느 한 항에 있어서, 각각의 백금 층이 3 내지 20Å의 두께를 가진 것을 특징으로 하는 재료 시스템.
  25. 제1항 내지 제24항 중 어느 한 항에 있어서, 각각의 다층 필름이 Pt/Co의 2 내지 15 주기로 구성되는 것을 특징으로 하는 재료 시스템.
  26. MO 기록에 적함하고 데이타의 직접 중복기입을 허용하는 제21항 또는 이에 종속하는 어느 항의 재료 시스템으로 구성되는 재료 시스템에 있어서, 백금 및 코발트의 다층 필름이 교환 결합되고 수직 자기이방성을 가진 것을 특징으로 하는 재료 시스템.
  27. 제1항 때지 제25항 중 어느 한 항의 재료 시스템으로 구성되는 것을 특징으로 하는 자기-광학 디스크.
  28. 백금 및 코발트의 두 다층 사이에 50Å에 이르는 평균 두께로 된 스페이서가 구비된 것을 특징으로 하는 제26항에 따른 재료 시스템을 제조하는 방법
  29. 제28항에 있어서, 스페이서가 초고온 처리공정을 거치는 것을 특징으로 하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019950700254A 1992-07-28 1993-07-26 자기-광학 기록 재료 시스템 KR100256896B1 (ko)

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GB929216074A GB9216074D0 (en) 1992-07-28 1992-07-28 Magneto-optical recording materials system
GB9216074.6 1992-07-28
PCT/GB1993/001575 WO1994002940A1 (en) 1992-07-28 1993-07-26 Magneto-optical recording materials system

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AU669924B2 (en) 1996-06-27
CN1081769A (zh) 1994-02-09
KR100256896B1 (ko) 2000-05-15
RU2117338C1 (ru) 1998-08-10
EP0653092A1 (en) 1995-05-17
ES2096937T3 (es) 1997-03-16
GB9216074D0 (en) 1992-09-09
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AU4716593A (en) 1994-02-14
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US6022630A (en) 2000-02-08
TW234759B (ko) 1994-11-21
WO1994002940A1 (en) 1994-02-03
MY114237A (en) 2002-09-30
RU95104946A (ru) 1996-12-20
EP0653092B1 (en) 1997-01-29
JPH07509335A (ja) 1995-10-12
DE69307896D1 (de) 1997-03-13
CA2141308A1 (en) 1994-02-03
CN1106638C (zh) 2003-04-23
DE69307896T2 (de) 1997-06-05
US5702830A (en) 1997-12-30

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