JPS5727452A - Magnetic recorder and reproducer - Google Patents

Magnetic recorder and reproducer

Info

Publication number
JPS5727452A
JPS5727452A JP10160380A JP10160380A JPS5727452A JP S5727452 A JPS5727452 A JP S5727452A JP 10160380 A JP10160380 A JP 10160380A JP 10160380 A JP10160380 A JP 10160380A JP S5727452 A JPS5727452 A JP S5727452A
Authority
JP
Japan
Prior art keywords
recording
magnetic
laser beam
reproducing
bit
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
JP10160380A
Other languages
Japanese (ja)
Inventor
Toshihisa Deguchi
Kenji Oota
Akira Takahashi
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP10160380A priority Critical patent/JPS5727452A/en
Publication of JPS5727452A publication Critical patent/JPS5727452A/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 obtain a high S/N ratio even although the output of the laser beam is reduced, by carrying out the recording with a vertical recording magnetic head and then the reproducing through an optical reproducing head using the laser beam. CONSTITUTION:On a magnetooptic disk 1, a thin film of an amorphous ferrimagnetic substance or a crystalline magnetic substance such as MuBi, MuBiCu is formed. When recording, the current changing its direction according to the information to be recorded is applied to an energizing coil 9. Thus the direction of the magnetic field energized between a main magnetic pole 7 and auxiliary magnetic pole 6 is changed upper and lower sides. In accordance with the direction of the magnetic field, the recording of the bit by bit is carried out with an alignment in one direction. When erasing the recorded bits, DC current is applied to the coil 9. When reproducing, a laser beam 11' is irradiated to the magnetic thin film.
JP10160380A 1980-07-23 1980-07-23 Magnetic recorder and reproducer Pending JPS5727452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10160380A JPS5727452A (en) 1980-07-23 1980-07-23 Magnetic recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10160380A JPS5727452A (en) 1980-07-23 1980-07-23 Magnetic recorder and reproducer

Publications (1)

Publication Number Publication Date
JPS5727452A true JPS5727452A (en) 1982-02-13

Family

ID=14304957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10160380A Pending JPS5727452A (en) 1980-07-23 1980-07-23 Magnetic recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS5727452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825428A (en) * 1985-02-20 1989-04-25 Nec Corporation Optomagnetic recording, reading and erasing method and implementing apparatus which permits overwriting of previously recorded information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825428A (en) * 1985-02-20 1989-04-25 Nec Corporation Optomagnetic recording, reading and erasing method and implementing apparatus which permits overwriting of previously recorded information

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