CA2142767A1 - Magneto-Optical Recording Medium, and Information Reproducing Method Using the Medium - Google Patents

Magneto-Optical Recording Medium, and Information Reproducing Method Using the Medium

Info

Publication number
CA2142767A1
CA2142767A1 CA2142767A CA2142767A CA2142767A1 CA 2142767 A1 CA2142767 A1 CA 2142767A1 CA 2142767 A CA2142767 A CA 2142767A CA 2142767 A CA2142767 A CA 2142767A CA 2142767 A1 CA2142767 A1 CA 2142767A1
Authority
CA
Canada
Prior art keywords
medium
magneto
layer
optical recording
recording 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.)
Granted
Application number
CA2142767A
Other languages
French (fr)
Other versions
CA2142767C (en
Inventor
Naoki Nishimura
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 JP2265394A external-priority patent/JPH06309729A/en
Priority claimed from JP4559494A external-priority patent/JPH07254176A/en
Application filed by Canon Inc filed Critical Canon Inc
Publication of CA2142767A1 publication Critical patent/CA2142767A1/en
Application granted granted Critical
Publication of CA2142767C publication Critical patent/CA2142767C/en
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
    • 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
    • G11B11/10515—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
    • G11B11/10584—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

Abstract

A magneto-optical recording medium includes a reproducing layer, a recording layer and an intermediate layer provided between the reproducing layer and the recording layer. The reproducing layer is an in-plane magnetization film at least at room temperature, and becomes a perpendicular magnetization film at a temperature between room temperature and a Curie temperature thereof. The recording layer is a perpendicular magnetization film in a temperature range from room temperature to a Curie temperature thereof.
The intermediate layer has a larger in-plane magnetic anisotropy at room temperature than an in-plane magnetic anisotropy of the reproducing layer.
CA002142767A 1994-02-21 1995-02-17 Magneto-optical recording medium, and information reproducing method using the medium Expired - Fee Related CA2142767C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP6-022653 1994-02-21
JP2265394A JPH06309729A (en) 1993-02-26 1994-02-21 Magneto-optical recording medium and method for reproducing information with the same
JP6-045594 1994-03-16
JP4559494A JPH07254176A (en) 1994-03-16 1994-03-16 Magneto-optical recording medium and method for reproducing information with same medium

Publications (2)

Publication Number Publication Date
CA2142767A1 true CA2142767A1 (en) 1995-08-22
CA2142767C CA2142767C (en) 1998-11-17

Family

ID=26359918

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002142767A Expired - Fee Related CA2142767C (en) 1994-02-21 1995-02-17 Magneto-optical recording medium, and information reproducing method using the medium

Country Status (6)

Country Link
US (2) US5830589A (en)
EP (1) EP0668586B1 (en)
KR (1) KR950025656A (en)
AU (1) AU696024B2 (en)
CA (1) CA2142767C (en)
DE (1) DE69526532T2 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2142767C (en) * 1994-02-21 1998-11-17 Naoki Nishimura Magneto-optical recording medium, and information reproducing method using the medium
JP3126612B2 (en) * 1994-12-26 2001-01-22 キヤノン株式会社 Recording medium transport device
JPH08180482A (en) * 1994-12-27 1996-07-12 Canon Inc Magneto-optical recording medium and information reproducing method using the same
EP0740296A3 (en) * 1995-04-26 1998-02-25 Sanyo Electric Co. Ltd Magneto-optical recording media
JPH0954993A (en) * 1995-08-15 1997-02-25 Canon Inc Magneto-optical recording medium and reproducing method of information in the medium
JP3545133B2 (en) * 1996-07-23 2004-07-21 シャープ株式会社 Method of reproducing magneto-optical recording medium and magneto-optical recording medium
JP3400251B2 (en) * 1996-07-30 2003-04-28 シャープ株式会社 Method of reproducing magneto-optical recording medium and magneto-optical recording medium
JPH10269627A (en) * 1997-03-21 1998-10-09 Toshiba Corp Optical recording medium and super-high resolution reproduction method
US6111784A (en) * 1997-09-18 2000-08-29 Canon Kabushiki Kaisha Magnetic thin film memory element utilizing GMR effect, and recording/reproduction method using such memory element
JP2000057646A (en) 1998-08-07 2000-02-25 Sony Corp Magneto-optical recording medium and magneto-optical recording and reproducing device
JP3568787B2 (en) * 1998-09-08 2004-09-22 シャープ株式会社 Magneto-optical recording medium and reproducing apparatus
US6603619B1 (en) * 1999-01-07 2003-08-05 Sharp Kabushiki Kaisha Magnetic storage medium and heat assisted recording and reproduction method
JP3476698B2 (en) * 1999-01-29 2003-12-10 シャープ株式会社 Magneto-optical recording medium
US6519211B1 (en) * 1999-04-01 2003-02-11 Matsushita Electric Industrial Co., Ltd. Magneto-optical recording medium having magnetic domain shrinks and disappears
JP3434242B2 (en) * 1999-07-29 2003-08-04 シャープ株式会社 Magneto-optical recording medium and reproducing method thereof
CN1770265A (en) * 2000-09-25 2006-05-10 日立麦克赛尔株式会社 Information recording medium, information recording apparatus, and recording method
US7035138B2 (en) * 2000-09-27 2006-04-25 Canon Kabushiki Kaisha Magnetic random access memory having perpendicular magnetic films switched by magnetic fields from a plurality of directions
JP2002334491A (en) * 2001-05-10 2002-11-22 Fujitsu Ltd Magneto-optical recording medium
AU2003244936A1 (en) * 2002-07-05 2004-01-23 Koninklijke Philips Electronics N.V. Magneto-optical recording medium with anti-ferromagnetically coupled domain-expansion double-layer structure
TW200809845A (en) * 2006-03-06 2008-02-16 Ricoh Co Ltd Optical recording medium, and method for initializing the optical recording medium

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1326547C (en) * 1988-07-13 1994-01-25 Masahiko Kaneko Thermomagnetic recording method
US5094925A (en) * 1989-06-30 1992-03-10 Sharp Kabushiki Kaisha Opto-magnetic recording medium
US5168482A (en) * 1989-08-31 1992-12-01 Sony Corporation Magnetooptical recording and playback method employing multi-layer recording medium with record holding layer and playback layer
JP2910084B2 (en) * 1989-09-06 1999-06-23 ソニー株式会社 Signal reproducing method in magneto-optical recording medium
JP2884617B2 (en) * 1989-09-08 1999-04-19 ソニー株式会社 Magneto-optical recording / reproducing method
US5241520A (en) * 1990-12-28 1993-08-31 Sony Corporation System and method of reproducing signals recorded on a magneto-optic recording medium
JP3106514B2 (en) 1991-02-08 2000-11-06 ソニー株式会社 Magneto-optical recording / reproducing method
JP3111479B2 (en) * 1991-02-08 2000-11-20 ソニー株式会社 Magneto-optical recording medium
JP2620992B2 (en) * 1991-02-15 1997-06-18 松下電工株式会社 Inspection method for soldered parts of electronic components
JP2839783B2 (en) * 1991-04-17 1998-12-16 シャープ株式会社 Magneto-optical recording medium, reproducing apparatus and reproducing method
JP2812817B2 (en) * 1991-07-08 1998-10-22 シャープ株式会社 Magneto-optical recording medium
EP0523944A3 (en) * 1991-07-16 1994-02-16 Canon Kk Magneto optical recording medium and method
JP2786360B2 (en) * 1991-12-05 1998-08-13 シャープ株式会社 Magneto-optical disk
DE69331924T2 (en) * 1992-08-28 2002-10-10 Canon Kk Magneto-optical recording medium and information recording and reproducing method therewith
JP2938284B2 (en) * 1992-10-06 1999-08-23 シャープ株式会社 Magneto-optical recording medium and recording / reproducing method using the same
JPH06162589A (en) * 1992-11-18 1994-06-10 Ricoh Co Ltd Magneto-optical recording medium and magneto-optical recording method
JP2999895B2 (en) * 1992-12-10 2000-01-17 シャープ株式会社 Magneto-optical recording medium
JP2857002B2 (en) * 1993-01-07 1999-02-10 シャープ株式会社 Magneto-optical storage device
JP3072812B2 (en) * 1993-04-08 2000-08-07 キヤノン株式会社 Magneto-optical recording medium and method of reproducing information from the medium
JP3078145B2 (en) 1993-04-23 2000-08-21 キヤノン株式会社 Method for manufacturing magneto-optical recording medium
CA2142767C (en) * 1994-02-21 1998-11-17 Naoki Nishimura Magneto-optical recording medium, and information reproducing method using the medium

Also Published As

Publication number Publication date
AU1235595A (en) 1995-08-31
US5830589A (en) 1998-11-03
DE69526532D1 (en) 2002-06-06
DE69526532T2 (en) 2002-10-31
EP0668586B1 (en) 2002-05-02
CA2142767C (en) 1998-11-17
AU696024B2 (en) 1998-08-27
KR950025656A (en) 1995-09-18
EP0668586A2 (en) 1995-08-23
EP0668586A3 (en) 1996-03-06
US6307816B1 (en) 2001-10-23

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Effective date: 20150217