DE69727874D1 - Magnetooptisches Auzeichnungsmedium - Google Patents

Magnetooptisches Auzeichnungsmedium

Info

Publication number
DE69727874D1
DE69727874D1 DE69727874T DE69727874T DE69727874D1 DE 69727874 D1 DE69727874 D1 DE 69727874D1 DE 69727874 T DE69727874 T DE 69727874T DE 69727874 T DE69727874 T DE 69727874T DE 69727874 D1 DE69727874 D1 DE 69727874D1
Authority
DE
Germany
Prior art keywords
magneto
recording medium
optical recording
optical
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 - Lifetime
Application number
DE69727874T
Other languages
English (en)
Other versions
DE69727874T2 (de
Inventor
Masahiro Tabata
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
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 JP8271918A external-priority patent/JPH10106057A/ja
Priority claimed from JP8280399A external-priority patent/JPH10106058A/ja
Priority claimed from JP9165019A external-priority patent/JPH10340492A/ja
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Publication of DE69727874D1 publication Critical patent/DE69727874D1/de
Application granted granted Critical
Publication of DE69727874T2 publication Critical patent/DE69727874T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • 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
    • G11B11/10593—Details for improving read-out properties, e.g. polarisation of light
    • 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
    • G11B11/10515—Reproducing
    • 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
    • G11B11/10502—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
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0026—Pulse recording
    • G11B2005/0029—Pulse recording using magnetisation components of the recording layer disposed mainly perpendicularly to the record carrier surface
DE69727874T 1996-09-20 1997-09-18 Magnetooptisches Auzeichnungsmedium Expired - Lifetime DE69727874T2 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP8271918A JPH10106057A (ja) 1996-09-20 1996-09-20 光磁気記録媒体
JP27191896 1996-09-20
JP28039996 1996-09-30
JP8280399A JPH10106058A (ja) 1996-09-30 1996-09-30 光磁気記録媒体
JP16501997 1997-06-06
JP9165019A JPH10340492A (ja) 1997-06-06 1997-06-06 光磁気記録媒体

Publications (2)

Publication Number Publication Date
DE69727874D1 true DE69727874D1 (de) 2004-04-08
DE69727874T2 DE69727874T2 (de) 2005-02-03

Family

ID=27322424

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69727874T Expired - Lifetime DE69727874T2 (de) 1996-09-20 1997-09-18 Magnetooptisches Auzeichnungsmedium

Country Status (4)

Country Link
US (1) US5903526A (de)
EP (2) EP1418577A2 (de)
KR (1) KR100268325B1 (de)
DE (1) DE69727874T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3519295B2 (ja) * 1998-11-30 2004-04-12 シャープ株式会社 光磁気記録媒体
US6526002B1 (en) 1999-09-02 2003-02-25 John Ruvalds Magneto-optic device exhibiting changes in reflectivity relative to a magnetic field and method and systems incorporating the same
JP2002170291A (ja) * 2000-11-29 2002-06-14 Sony Corp 光磁気記録媒体
JP4915626B2 (ja) * 2009-03-18 2012-04-11 株式会社東芝 磁気抵抗効果素子および磁気ランダムアクセスメモリ

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60187954A (ja) * 1984-03-07 1985-09-25 Toshiba Corp 磁性薄膜記録媒体
JPS6122608A (ja) * 1984-07-11 1986-01-31 Hitachi Ltd 光磁気記録材料
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
JPS62293537A (ja) * 1986-06-13 1987-12-21 Hitachi Ltd 光磁気デイスク用記録媒体
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
EP0289031A3 (de) * 1987-05-01 1989-02-08 Shin-Etsu Chemical Co., Ltd. Magneto-optischer Aufzeichnungsträger
JPS6443835A (en) * 1987-08-11 1989-02-16 Mitsui Petrochemical Ind Magneto-optical recording medium
EP0318925B1 (de) * 1987-11-30 1994-04-20 Sony Corporation Methode zum optischen Abtasten eines Signals aus einem magneto-optischen Speichermedium
CA1326547C (en) * 1988-07-13 1994-01-25 Masahiko Kaneko Thermomagnetic recording method
US5512366A (en) * 1989-11-14 1996-04-30 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording medium and apparatus
US5273835A (en) * 1989-09-25 1993-12-28 Nikon Corporation Over-write capable magnetooptical recording medium
US6200673B1 (en) * 1989-11-13 2001-03-13 Hitachi, Ltd. Magneto-optical recording medium
JP2910287B2 (ja) * 1990-12-19 1999-06-23 ソニー株式会社 光磁気記録媒体
CA2067945C (en) * 1991-05-16 2001-09-04 Shintaro Tanaka Magneto-optical recording medium
JPH05159389A (ja) * 1991-12-02 1993-06-25 Victor Co Of Japan Ltd 光磁気記録媒体
JPH06215428A (ja) * 1993-01-18 1994-08-05 Victor Co Of Japan Ltd 光磁気記録媒体
JPH076435A (ja) * 1993-06-17 1995-01-10 Victor Co Of Japan Ltd 光磁気記録方法
JP3091099B2 (ja) * 1994-11-25 2000-09-25 シャープ株式会社 光磁気記録媒体および光磁気記録再生方法

Also Published As

Publication number Publication date
US5903526A (en) 1999-05-11
EP1418577A2 (de) 2004-05-12
KR100268325B1 (ko) 2000-10-16
EP0831475B1 (de) 2004-03-03
EP0831475A2 (de) 1998-03-25
DE69727874T2 (de) 2005-02-03
EP0831475A3 (de) 1998-09-30
KR19980024768A (ko) 1998-07-06

Similar Documents

Publication Publication Date Title
DE69730080D1 (de) Magnetooptischer Aufzeichnungsträger
DE69727710T2 (de) Informationsaufzeichnungsmedium
DE69739630D1 (de) Informationsaufzeichnungsmedium
DE69736040D1 (de) Magneto-optisches Aufzeichnungsmedium
DE69703816T2 (de) Optisches Aufzeichnungsmedium
DE69711554T2 (de) Optisches Aufzeichnungsmedium
DE69728807D1 (de) Optisches Aufzeichnungsmedium
DE69417806D1 (de) Magnetooptischer Aufzeichnungsträger
DE69323162T2 (de) Magnetooptischer Aufzeichnungsträger
DE69421234D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69726130D1 (de) Optisches aufzeichnungsmedium
DE69325352D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69703824T2 (de) Optisches Aufzeichnungsmedium
DE69709477D1 (de) Magnetische Aufzeichnungsmedium
DE69421299T2 (de) Magneto-optisches Aufzeichnungsmedium
DE69322222T2 (de) Magnetooptischer Aufzeichnungsträger
DE69726686T2 (de) Magnetooptisches Aufzeichnungsmedium
DE69737438D1 (de) Magnetisches Aufzeichnungsmedium
DE69739806D1 (de) Magnetooptisches Aufzeichnungsmedium
DE69727874D1 (de) Magnetooptisches Auzeichnungsmedium
DE69320751D1 (de) Magnetooptischer Aufzeichnungsträger
EP0817182A4 (de) Magnetoptisches aufzeichnungsmedium
DE69704473D1 (de) Magnetisches Aufzeichnungsmedium
DE69701766T2 (de) Optisches Aufzeichnungsmedium
DE69706906T2 (de) Magnetisches Aufzeichnungsmedium

Legal Events

Date Code Title Description
8332 No legal effect for de
8370 Indication related to discontinuation of the patent is to be deleted
8364 No opposition during term of opposition