GB2071696B - Magneto-optical recording medium - Google Patents

Magneto-optical recording medium

Info

Publication number
GB2071696B
GB2071696B GB8107897A GB8107897A GB2071696B GB 2071696 B GB2071696 B GB 2071696B GB 8107897 A GB8107897 A GB 8107897A GB 8107897 A GB8107897 A GB 8107897A GB 2071696 B GB2071696 B GB 2071696B
Authority
GB
United Kingdom
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
Application number
GB8107897A
Other versions
GB2071696A (en
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.)
Kokusai Denshin Denwa KK
Original Assignee
Kokusai Denshin Denwa KK
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 to JP3025180A priority Critical patent/JPS6032331B2/ja
Application filed by Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Publication of GB2071696A publication Critical patent/GB2071696A/en
Application granted granted Critical
Publication of GB2071696B publication Critical patent/GB2071696B/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C45/00Amorphous alloys
    • C22C45/02Amorphous alloys with iron as the major constituent
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00Thin magnetic films, e.g. of one-domain structure
    • H01F10/08Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H01F10/12Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00Thin magnetic films, e.g. of one-domain structure
    • H01F10/08Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H01F10/12Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
    • H01F10/13Amorphous metallic alloys, e.g. glassy metals
    • H01F10/133Amorphous metallic alloys, e.g. glassy metals containing rare earth metals
    • H01F10/135Amorphous metallic alloys, e.g. glassy metals containing rare earth metals containing transition metals
    • H01F10/136Amorphous metallic alloys, e.g. glassy metals containing rare earth metals containing transition metals containing iron
GB8107897A 1980-03-12 1981-03-12 Magneto-optical recording medium Expired GB2071696B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3025180A JPS6032331B2 (en) 1980-03-12 1980-03-12

Publications (2)

Publication Number Publication Date
GB2071696A GB2071696A (en) 1981-09-23
GB2071696B true GB2071696B (en) 1983-11-16

Family

ID=12298485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8107897A Expired GB2071696B (en) 1980-03-12 1981-03-12 Magneto-optical recording medium

Country Status (3)

Country Link
JP (1) JPS6032331B2 (en)
GB (1) GB2071696B (en)
NL (1) NL8101143A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318337A2 (en) * 1987-11-26 1989-05-31 Sharp Kabushiki Kaisha Magneto-optic memory medium

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4234256A (en) * 1978-04-03 1980-11-18 The Goodyear Tire & Rubber Company Determining depth location of separations within a tire
JPS6137765B2 (en) * 1980-04-16 1986-08-26 Fuji Photo Film Co Ltd
JPH0235371B2 (en) * 1980-11-01 1990-08-09 Daido Tokushuko Kk
CA1185013A (en) * 1981-01-14 1985-04-02 Kenji Ohta Magneto-optic memory medium
JPS5873030A (en) * 1981-10-27 1983-05-02 Kokusai Denshin Denwa Co Ltd <Kdd> Optical magnetic recording medium
JPH0234096B2 (en) * 1982-01-21 1990-08-01 Japan Broadcasting Corp
DE3348424C2 (en) * 1982-03-17 1996-06-27 Canon Kk Terbium:iron:cobalt alloy used as magneto:optic recording material
DE3309483C3 (en) * 1982-03-17 2003-02-27 Canon Kk Magneto-optical recording material and its use
DE3348423C2 (en) * 1982-05-10 1994-11-17 Canon Kk Use of an amorphous magnetic quaternary GdTbFeCo alloy for the production of a magneto-optical recording layer
US4693943A (en) * 1982-05-10 1987-09-15 Canon Kabushiki Kaisha Magnetooptical recording medium
JPH0232690B2 (en) * 1982-05-10 1990-07-23 Canon Kk
JPH0410132B2 (en) * 1982-05-17 1992-02-24
JPS5917222A (en) * 1982-07-21 1984-01-28 Hitachi Ltd Manufacture of multilayer magnetic thin-film
JPH0118506B2 (en) * 1982-11-04 1989-04-06 Seiko Denshi Kogyo Kk
JPS59178641A (en) * 1983-03-29 1984-10-09 Kokusai Denshin Denwa Co Ltd <Kdd> Photomagnetic recording medium
JPS59178628A (en) * 1983-03-30 1984-10-09 Canon Inc Information recording method
EP0125536A3 (en) * 1983-05-11 1986-06-25 MOVID Information Technology, Inc. Thermo-magnetic recording materials supporting small stable domains
US4569881A (en) * 1983-05-17 1986-02-11 Minnesota Mining And Manufacturing Company Multi-layer amorphous magneto optical recording medium
US4833043A (en) * 1983-05-17 1989-05-23 Minnesota Mining And Manufacturing Company Amorphous magneto optical recording medium
US4721658A (en) * 1984-04-12 1988-01-26 Minnesota Mining And Manufacturing Company Amorphous magneto optical recording medium
US4615944A (en) * 1983-05-17 1986-10-07 Minnesota Mining And Manufacturing Company Amorphous magneto optical recording medium
JPH0566661B2 (en) * 1983-08-15 1993-09-22 Ulvac Corp
GB2150946B (en) * 1983-11-05 1987-08-19 Canon Kk Magneto-optical recording medium
JPS61214254A (en) * 1985-03-20 1986-09-24 Hitachi Ltd Photomagnetic recording material
JPH0782670B2 (en) * 1985-07-12 1995-09-06 株式会社日立製作所 Magneto-optical recording medium
DE3773531D1 (en) * 1986-05-14 1991-11-14 Teijin Ltd Magneto-optical record carrier.
US4822675A (en) * 1987-01-14 1989-04-18 Minnesota Mining And Manufacturing Company Stable magneto optic recording medium
US4950556A (en) * 1987-10-26 1990-08-21 Minnesota Mining And Manufacturing Company Magneto-optic recording medium
US6001467A (en) * 1987-11-26 1999-12-14 Sharp Kabushiki Kaisha Magneto-optic memory medium
DE3803000A1 (en) * 1988-02-02 1989-08-10 Basf Ag Surface multi-layer magneto-optical recording material
CA1333820C (en) * 1988-09-13 1995-01-03 Masahiko Sekiya Magneto-optical recording medium
JP2660569B2 (en) * 1989-02-10 1997-10-08 三菱電機株式会社 Magneto-optical recording medium
CA2017284C (en) * 1989-07-04 1995-10-03 Kazutomi Suzuki Optical recording medium
JP2763419B2 (en) * 1991-07-08 1998-06-11 シャープ株式会社 Magneto-optical recording medium
JPH0746445B2 (en) * 1993-10-12 1995-05-17 ダイセル化学工業株式会社 Magneto-optical recording disk and manufacturing method thereof
JP3539531B2 (en) * 1996-04-22 2004-07-07 シャープ株式会社 Magneto-optical recording medium
US7076983B2 (en) 2001-03-16 2006-07-18 Nakayama Steel Works, Ltd. Apparatus and method for hot rolling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318337A2 (en) * 1987-11-26 1989-05-31 Sharp Kabushiki Kaisha Magneto-optic memory medium
EP0318337B1 (en) * 1987-11-26 1994-02-02 Sharp Kabushiki Kaisha Magneto-optic memory medium

Also Published As

Publication number Publication date
JPS6032331B2 (en) 1985-07-27
JPS56126907A (en) 1981-10-05
NL8101143A (en) 1981-10-01
GB2071696A (en) 1981-09-23

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20010311