JPS6464152A - Magneto-optical recording system - Google Patents

Magneto-optical recording system

Info

Publication number
JPS6464152A
JPS6464152A JP12106487A JP12106487A JPS6464152A JP S6464152 A JPS6464152 A JP S6464152A JP 12106487 A JP12106487 A JP 12106487A JP 12106487 A JP12106487 A JP 12106487A JP S6464152 A JPS6464152 A JP S6464152A
Authority
JP
Japan
Prior art keywords
layer
magnetic field
case
upward
magnetization
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
JP12106487A
Other languages
Japanese (ja)
Other versions
JP2578115B2 (en
Inventor
Tetsuo Iijima
Osamu Ishii
Iwao Hatakeyama
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP62121064A priority Critical patent/JP2578115B2/en
Publication of JPS6464152A publication Critical patent/JPS6464152A/en
Application granted granted Critical
Publication of JP2578115B2 publication Critical patent/JP2578115B2/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
    • 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

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To decrease the number of components, and also, to contrive the reduction of an operation margin, and a design margin of components, by constituting a reference layer so as to always have a stable residual magnetized state in one direction at a room temperature. CONSTITUTION:A recording medium 1 is constituted of a memory layer 2 and a reference layer 3'. The layer 3' is always magnetized upward at a room temperature. In case of writing newly a level '0' to the layer 2, optical power is applied to a medium 1 under a bias magnetic field 6' by a bias magnetic field applying magnet 6, and only the layer 2 is set to a Curie temperature Tc or below. In this case, the first upward magnetized state of the layer 3' is reserved, and the upward magnetization is guided to the layer 2. Subsequently, in case of writing newly a level '1' to the layer 2, optical power is applied to the medium 1 under a magnetic field 6' and the layer 2 is set to the Tc or above. In this case, the layer 3' becomes the downward magnetization, and in the cooling process, the layer 2 also becomes the downward magnetization. The downward magnetization of the layer 3' returns to the upward magnetization, when the influence by the magnetic field 6' becomes small together with the traveling of the medium 1.
JP62121064A 1987-05-20 1987-05-20 Magneto-optical recording method Expired - Fee Related JP2578115B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62121064A JP2578115B2 (en) 1987-05-20 1987-05-20 Magneto-optical recording method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62121064A JP2578115B2 (en) 1987-05-20 1987-05-20 Magneto-optical recording method

Publications (2)

Publication Number Publication Date
JPS6464152A true JPS6464152A (en) 1989-03-10
JP2578115B2 JP2578115B2 (en) 1997-02-05

Family

ID=14801948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62121064A Expired - Fee Related JP2578115B2 (en) 1987-05-20 1987-05-20 Magneto-optical recording method

Country Status (1)

Country Link
JP (1) JP2578115B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6352355A (en) * 1986-08-20 1988-03-05 Sony Corp Thermomagnetic recording method
JPS63237242A (en) * 1987-03-26 1988-10-03 Canon Inc Magneto-optical recording system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6352355A (en) * 1986-08-20 1988-03-05 Sony Corp Thermomagnetic recording method
JPS63237242A (en) * 1987-03-26 1988-10-03 Canon Inc Magneto-optical recording system

Also Published As

Publication number Publication date
JP2578115B2 (en) 1997-02-05

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees