JPS57186247A - Photomagnetic recording medium - Google Patents

Photomagnetic recording medium

Info

Publication number
JPS57186247A
JPS57186247A JP6932881A JP6932881A JPS57186247A JP S57186247 A JPS57186247 A JP S57186247A JP 6932881 A JP6932881 A JP 6932881A JP 6932881 A JP6932881 A JP 6932881A JP S57186247 A JPS57186247 A JP S57186247A
Authority
JP
Japan
Prior art keywords
film
magnetized
laser beam
recording
light
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.)
Pending
Application number
JP6932881A
Other languages
Japanese (ja)
Inventor
Nobuo 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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co 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
Application filed by Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP6932881A priority Critical patent/JPS57186247A/en
Publication of JPS57186247A publication Critical patent/JPS57186247A/en
Pending 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

Abstract

PURPOSE:To facilitate the track control and the focus control, by forming a vertically magnetized film on a substrate and forming an opaque film on this vertically magnetized film and providing windows for transmission of light in the opaque film. CONSTITUTION:A vertically magnetized film B is stuck to the first face of a substrate A, and an opaque film C where bits having a short diameter D are provided continuously on all of the surface is stuck to the film B. The short diameter D has a size of the wavelength of recording and reproducing light beams approximately. In case of recording, only bit parts of the magnetized film B are magnetized and inverted by heating of the laser beam modulated by recording information. That is, the temperature of the medium is raised up to the Curie point by the laser beam, and simultaneously, the medium is magnetized by the magnetic field. In case of reproducing, the laser beam is irradiated to pertinent bits, and a reproduced signal is obtained on a basis of the change of the polarization state of the reflection light or the transmission light due to the magnetization direction of the magnetized film B.
JP6932881A 1981-05-11 1981-05-11 Photomagnetic recording medium Pending JPS57186247A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6932881A JPS57186247A (en) 1981-05-11 1981-05-11 Photomagnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6932881A JPS57186247A (en) 1981-05-11 1981-05-11 Photomagnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57186247A true JPS57186247A (en) 1982-11-16

Family

ID=13399366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6932881A Pending JPS57186247A (en) 1981-05-11 1981-05-11 Photomagnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57186247A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6295754A (en) * 1985-10-22 1987-05-02 Nippon Sheet Glass Co Ltd Photomagnetic recording medium
EP0327315A2 (en) * 1988-02-03 1989-08-09 Hitachi, Ltd. Magneto-optic recording medium and method for magneto-optically recording on said medium
US5031162A (en) * 1987-09-30 1991-07-09 Deutsche Thomson-Brandt Gmbh Magneto-optical recorded medium with a transparent substrate layer
US5060208A (en) * 1987-12-25 1991-10-22 Hitachi, Ltd. Magnetooptical recording method and apparatus utilizing shift adjustment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6295754A (en) * 1985-10-22 1987-05-02 Nippon Sheet Glass Co Ltd Photomagnetic recording medium
US5031162A (en) * 1987-09-30 1991-07-09 Deutsche Thomson-Brandt Gmbh Magneto-optical recorded medium with a transparent substrate layer
US5060208A (en) * 1987-12-25 1991-10-22 Hitachi, Ltd. Magnetooptical recording method and apparatus utilizing shift adjustment
EP0327315A2 (en) * 1988-02-03 1989-08-09 Hitachi, Ltd. Magneto-optic recording medium and method for magneto-optically recording on said medium

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