FR2533731B1 - Dispositif de memoire thermomagneto-optique et son milieu d'enregistrement - Google Patents

Dispositif de memoire thermomagneto-optique et son milieu d'enregistrement

Info

Publication number
FR2533731B1
FR2533731B1 FR8315136A FR8315136A FR2533731B1 FR 2533731 B1 FR2533731 B1 FR 2533731B1 FR 8315136 A FR8315136 A FR 8315136A FR 8315136 A FR8315136 A FR 8315136A FR 2533731 B1 FR2533731 B1 FR 2533731B1
Authority
FR
France
Prior art keywords
thermomagneto
recording medium
memory device
optical memory
optical
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
FR8315136A
Other languages
English (en)
Other versions
FR2533731A1 (fr
Inventor
Jan Willem Dirk Martens
Winfried Lodewijk Peeters
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2533731A1 publication Critical patent/FR2533731A1/fr
Application granted granted Critical
Publication of FR2533731B1 publication Critical patent/FR2533731B1/fr
Expired 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
    • 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
FR8315136A 1982-09-27 1983-09-23 Dispositif de memoire thermomagneto-optique et son milieu d'enregistrement Expired FR2533731B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8203725A NL8203725A (nl) 1982-09-27 1982-09-27 Thermo-magneto-optische geheugeninrichting en registratiemedium daarvoor.

Publications (2)

Publication Number Publication Date
FR2533731A1 FR2533731A1 (fr) 1984-03-30
FR2533731B1 true FR2533731B1 (fr) 1988-06-24

Family

ID=19840330

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8315136A Expired FR2533731B1 (fr) 1982-09-27 1983-09-23 Dispositif de memoire thermomagneto-optique et son milieu d'enregistrement

Country Status (9)

Country Link
US (1) US4586092A (fr)
JP (1) JPS5979447A (fr)
AU (1) AU558518B2 (fr)
CA (1) CA1213038A (fr)
DE (1) DE3332840A1 (fr)
FR (1) FR2533731B1 (fr)
GB (1) GB2127611B (fr)
IT (1) IT1170222B (fr)
NL (1) NL8203725A (fr)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8303281A (nl) * 1983-09-26 1985-04-16 Philips Nv Werkwijze voor het schrijven van informatie in een magneto-optische registratiedrager, inrichting voor het uitvoeren van de werkwijze en een magneto-optische registratiedrager te gebruiken in een inrichting voor het uitvoeren van de werkwijze.
JPH0619863B2 (ja) * 1984-06-13 1994-03-16 株式会社日立製作所 光磁気情報記憶方法及び装置
JPS6122452A (ja) * 1984-07-09 1986-01-31 Kokusai Denshin Denwa Co Ltd <Kdd> 光磁気記録媒体
JPS6185653A (ja) * 1984-10-02 1986-05-01 Sharp Corp 光磁気メモリ素子
US4764436A (en) * 1985-05-20 1988-08-16 Research Development Corporation Of Japan Iron-oxygen based perpendicular magnetized anisotropic thin film
DE3677078D1 (de) * 1985-07-10 1991-02-28 Mitsubishi Chem Ind Magnetooptischer traeger.
US4794560A (en) * 1985-09-30 1988-12-27 International Business Machines Corporation Eraseable self biasing thermal magneto-optic medium
FR2588406B1 (fr) * 1985-10-04 1994-03-25 Thomson Csf Tete d'enregistrement thermomagnetique et procede de realisation
GB2184618A (en) * 1985-12-11 1987-06-24 Canon Kk Magneto-optical memory medium
DE3704146A1 (de) * 1987-02-11 1988-09-29 Basf Ag Laseroptisches schreib- und leseverfahren
US4962492A (en) * 1988-04-29 1990-10-09 Laser Magnetic Storage International Company Magneto-optic data recording system, actuating device therefor and method of providing same
JP2536917B2 (ja) * 1989-02-06 1996-09-25 日本製紙株式会社 光記録体
JP2768981B2 (ja) * 1989-06-22 1998-06-25 シャープ株式会社 光メモリ素子
JP2896193B2 (ja) * 1989-07-27 1999-05-31 株式会社東芝 酸化物結晶配向膜の製造方法及び酸化物結晶配向膜並びに光磁気記録媒体
US5197049A (en) * 1989-08-11 1993-03-23 Apple Computer, Inc. Head and media for optical data storage
JPH03219450A (ja) * 1989-11-13 1991-09-26 Hitachi Maxell Ltd 光磁気記録媒体
FR2655463B1 (fr) * 1989-12-06 1995-06-30 Commissariat Energie Atomique Procede de preparation d'une memoire magnetooptique.
JP3038853B2 (ja) * 1990-09-13 2000-05-08 株式会社ニコン 高レベルのマージンが拡大したオーバーライト可能な光磁気記録媒体
US5573847A (en) * 1990-09-14 1996-11-12 Komag, Inc. Magneto-optic disk exhibiting a phase shift between plus and minus twelve degrees and a reflectivity between fifteen and twenty-five percent
US5251202A (en) * 1991-05-23 1993-10-05 Ricoh Company, Ltd. Optical information recording medium having multi-layered structures for preventing undesired reflection and electric charging
US5320881A (en) * 1991-08-27 1994-06-14 Northeastern University Fabrication of ferrite films using laser deposition
US5227204A (en) * 1991-08-27 1993-07-13 Northeastern University Fabrication of ferrite films using laser deposition
WO1995034885A2 (fr) * 1994-06-09 1995-12-21 Philips Electronics N.V. Support d'enregistrement magneto-optique
FR2802696B1 (fr) * 1999-12-17 2002-07-19 Thomson Csf Lecteur magneto optique optimise par le polariseur de lumiere incidente
JP4380096B2 (ja) * 2001-08-20 2009-12-09 コニカミノルタビジネステクノロジーズ株式会社 反射型の読み取り光学系
FR2832251B1 (fr) * 2001-11-12 2006-08-25 Univ Toulouse Utilisations d'oxydes spinelles oxydables comme materiaux pour couche sensible d'un support optique enregistrable une seule fois
JP3794953B2 (ja) * 2001-12-17 2006-07-12 富士通株式会社 光磁気記録媒体
JP4728916B2 (ja) * 2006-08-31 2011-07-20 国立大学法人 東京大学 磁性材料

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA805652A (en) * 1969-02-04 D. Westwood William Preparation of polycrystalline and single crystal films of ferrite spinels
US3174140A (en) * 1959-07-01 1965-03-16 Ibm Magneto-optical recording and readout device
NL278562A (fr) * 1961-05-19
US3648257A (en) * 1966-08-24 1972-03-07 Minnesota Mining & Mfg Sheetlike material, the method of storing an image consisting of differing magnetic, electrical, and optical properties
US3472575A (en) * 1966-11-04 1969-10-14 Ampex Magnetic storage medium for enhancing magneto-optic readout
US3636535A (en) * 1969-12-10 1972-01-18 Magnavox Co Magneto-optical transducer
US3626394A (en) * 1970-04-09 1971-12-07 Magnavox Co Magneto-optical system
US3683405A (en) * 1970-06-17 1972-08-08 Bell & Howell Co Magnetic deformation recording
US3838907A (en) * 1971-06-24 1974-10-01 Philips Corp Magnetisable material for detecting or recording electromagnetic radiation
US3778791A (en) * 1971-10-06 1973-12-11 Nasa Thermomagnetic recording and magneto-optic playback system having constant intensity laser beam control
NL160659C (nl) * 1972-01-08 1979-11-15 Philips Nv Magneto-optische inrichting.
US3859129A (en) * 1972-05-26 1975-01-07 Corning Glass Works Method of improving the magnetic properties of cobalt substituted magnetite
US3928870A (en) * 1973-12-14 1975-12-23 Eastman Kodak Co Magneto-optical processes and elements using tetrahedrally coordinated divalent cobalt-containing magnetic material
JPS533805A (en) * 1976-07-01 1978-01-13 Fuji Photo Film Co Ltd Magnetic recording medium
NL7708959A (nl) * 1977-08-15 1979-02-19 Philips Nv Werkwijze voor het vormen van een magneto-op- tische polykristallijne cobalt ferriet laag en cobalt ferriet laag vervaardigd volgens de werkwijze.
NL7900921A (nl) * 1979-02-06 1980-08-08 Philips Nv Thermomagnetische informatiedrager en optische geheu- geninrichting voorzien van een dergelijke informatie- drager.
GB2083677B (en) * 1980-07-16 1985-01-23 Matsushita Electric Ind Co Ltd Magnetooptical recording medium and a magnetooptical recording-and reeproducing device
JPS5755547A (en) * 1980-09-22 1982-04-02 Olympus Optical Co Ltd Information reader of photomagnetic recording medium
JPS57120253A (en) * 1981-01-14 1982-07-27 Sharp Corp Magnetooptical storage elemen
NL8201411A (nl) * 1982-04-02 1983-11-01 Philips Nv Werkwijze voor het optekenen van een digitaal informatiesignaal op een registratiedrager met een stralingsgevoelige informatielaag, een inrichting hiervoor en een optische registratiedrager voorzien van een dergelijk digitaal informatiesignaal.
US4466035A (en) * 1982-02-25 1984-08-14 Xerox Corporation Magneto-optic media and system optimization

Also Published As

Publication number Publication date
IT1170222B (it) 1987-06-03
JPS5979447A (ja) 1984-05-08
AU1954183A (en) 1984-04-05
DE3332840A1 (de) 1984-03-29
US4586092A (en) 1986-04-29
IT8322986A0 (it) 1983-09-23
IT8322986A1 (it) 1985-03-23
GB2127611B (en) 1985-10-16
NL8203725A (nl) 1984-04-16
FR2533731A1 (fr) 1984-03-30
AU558518B2 (en) 1987-01-29
GB2127611A (en) 1984-04-11
GB8325499D0 (en) 1983-10-26
CA1213038A (fr) 1986-10-21

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Legal Events

Date Code Title Description
ST Notification of lapse