JPS641102A - Bias magnetic field application device for magneto-optical recording - Google Patents

Bias magnetic field application device for magneto-optical recording

Info

Publication number
JPS641102A
JPS641102A JP15456487A JP15456487A JPS641102A JP S641102 A JPS641102 A JP S641102A JP 15456487 A JP15456487 A JP 15456487A JP 15456487 A JP15456487 A JP 15456487A JP S641102 A JPS641102 A JP S641102A
Authority
JP
Japan
Prior art keywords
magnetic field
magnetic pole
coil
recording medium
recording
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
JP15456487A
Other languages
Japanese (ja)
Other versions
JPH011102A (en
Inventor
Takeshi Terasawa
Teruo Furukawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15456487A priority Critical patent/JPS641102A/en
Publication of JPH011102A publication Critical patent/JPH011102A/en
Publication of JPS641102A publication Critical patent/JPS641102A/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

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To eliminate the moving part and to contrive to attain low power consumption by switching a magnetic pole in response to the location of information recording or erasure of recorded information with respect to magneto- optical recording medium. CONSTITUTION:A bias magnetic field is applied by supplying a current to a coil 4b wound on a magnetic pole 3b placed near a minute spot A being the result of converging a laser beam on a recording medium 6 to form an inverted magnetic domain. In applying the recording or erasure on the recording medium 6 at a position B, a bias magnetic field is applied by a magnetic pole 3c by supplying current to a coil 4c wound on a magnetic pole 3c near the point B while switching the coil to form an inverted magnetic domain similarly. Thus, the magnetic pole, that is, the coil is selected depending on the location of recording of the information or the erasure of the information recorded to/from the recording medium 5 thereby allowing smaller power than that of a method forming a magnetic field over the entire track width.
JP15456487A 1987-06-23 1987-06-23 Bias magnetic field application device for magneto-optical recording Pending JPS641102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15456487A JPS641102A (en) 1987-06-23 1987-06-23 Bias magnetic field application device for magneto-optical recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15456487A JPS641102A (en) 1987-06-23 1987-06-23 Bias magnetic field application device for magneto-optical recording

Publications (2)

Publication Number Publication Date
JPH011102A JPH011102A (en) 1989-01-05
JPS641102A true JPS641102A (en) 1989-01-05

Family

ID=15586998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15456487A Pending JPS641102A (en) 1987-06-23 1987-06-23 Bias magnetic field application device for magneto-optical recording

Country Status (1)

Country Link
JP (1) JPS641102A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140568A (en) * 1988-08-12 1992-08-18 Olympus Optical Co., Ltd. Photomagnetic recording and erasing apparatus having magnetic field generating device including a coil and a recording media facing member which extends beyond the coil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140568A (en) * 1988-08-12 1992-08-18 Olympus Optical Co., Ltd. Photomagnetic recording and erasing apparatus having magnetic field generating device including a coil and a recording media facing member which extends beyond the coil

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