JPS55129908A - Thermomagnetic recording and reproducing device - Google Patents

Thermomagnetic recording and reproducing device

Info

Publication number
JPS55129908A
JPS55129908A JP3029879A JP3029879A JPS55129908A JP S55129908 A JPS55129908 A JP S55129908A JP 3029879 A JP3029879 A JP 3029879A JP 3029879 A JP3029879 A JP 3029879A JP S55129908 A JPS55129908 A JP S55129908A
Authority
JP
Japan
Prior art keywords
thin film
magnetic
given
recording
laser 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.)
Granted
Application number
JP3029879A
Other languages
Japanese (ja)
Other versions
JPS6217282B2 (en
Inventor
Hisahiro Hanaoka
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP3029879A priority Critical patent/JPS55129908A/en
Priority to DE19803009978 priority patent/DE3009978C2/en
Publication of JPS55129908A publication Critical patent/JPS55129908A/en
Publication of JPS6217282B2 publication Critical patent/JPS6217282B2/ja
Granted 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
    • 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
    • G11B11/10532—Heads
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE: To make it possible to enhance a recording density considerably by providing an auxiliary magnetic pole to converge the magnetic flux given to a recording medium.
CONSTITUTION: The laser light from light source 4 is given to half mirror 6 through light modulation unit 5 and polarizer 51 and is reflected and is given to the surface of magnetic thin film 2 through lens 7. When the laser light is focused on thin film 2, the spot part is heated to lower coercive force. Under this state, when a magnetic field corresponding to a recording signal is generated from coil 10, the magnetic flux dependent upon the magnetic field magnetizes the part of thin film 2, thus recording prescribed information. In this case, the generated magnetic flux of coil 10 is converged to the part of very narrow ferromagnetic material 14 of auxiliary magnetic pole 11 and is given to the heated part of thin film 2 from the vertical direction. Consequently, even if the heated part of the laser light spot focused on thin film 2 has a spread, the magnetized region is limited to a very narrow part of magnetic material 14 of magnetic pole 11, so that the recording density can be enhanced considerably.
COPYRIGHT: (C)1980,JPO&Japio
JP3029879A 1979-03-15 1979-03-15 Thermomagnetic recording and reproducing device Granted JPS55129908A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3029879A JPS55129908A (en) 1979-03-15 1979-03-15 Thermomagnetic recording and reproducing device
DE19803009978 DE3009978C2 (en) 1979-03-15 1980-03-14 Device for magneto-optical recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3029879A JPS55129908A (en) 1979-03-15 1979-03-15 Thermomagnetic recording and reproducing device

Related Child Applications (3)

Application Number Title Priority Date Filing Date
JP18710485A Division JPS61105746A (en) 1985-08-26 1985-08-26 Thermal magnetic recording and reproducing device
JP18710685A Division JPS61105748A (en) 1985-08-26 1985-08-26 Thermal magnetic recording and reproducing device
JP18710585A Division JPS61105747A (en) 1985-08-26 1985-08-26 Thermal magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS55129908A true JPS55129908A (en) 1980-10-08
JPS6217282B2 JPS6217282B2 (en) 1987-04-16

Family

ID=12299824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3029879A Granted JPS55129908A (en) 1979-03-15 1979-03-15 Thermomagnetic recording and reproducing device

Country Status (2)

Country Link
JP (1) JPS55129908A (en)
DE (1) DE3009978C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200407A (en) * 1982-05-18 1983-11-22 Olympus Optical Co Ltd Magneto-optical recording and reproducing device
US4706232A (en) * 1985-10-17 1987-11-10 Olympus Optical Co., Ltd. Optical recording and reproducing apparatus
US4862437A (en) * 1984-10-26 1989-08-29 Nec Corporation Magneto-optical recording reproducing, and erasing apparatus having two independent magnetic field applying devices

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061892B1 (en) * 1981-03-26 1988-06-22 Sony Corporation Thermomagnetic recording methods
US4610009A (en) * 1983-05-23 1986-09-02 Xerox Corporation Writing, erasing and readout system for a magneto-optic recording medium
JPH065585B2 (en) * 1984-02-15 1994-01-19 株式会社日立製作所 Magneto-optical storage device
JPH0673197B2 (en) * 1985-02-25 1994-09-14 株式会社東芝 Magneto-optical recording medium and manufacturing method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107121A (en) * 1975-03-17 1976-09-22 Yoshifumi Sakurai HIKARIJIKI KIROKU HOSHIKI
JPS5332009A (en) * 1976-09-06 1978-03-25 Univ Tohoku Vertical magnetic recording reproducing magnetic head
JPS5421709A (en) * 1977-07-19 1979-02-19 Fuji Photo Film Co Ltd Thermomagnetic recording system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171754A (en) * 1961-01-30 1965-03-02 Ampex Magnetic storage medium for magneto-optical readout
GB1377447A (en) * 1971-03-02 1974-12-18 Rca Corp Apparatus for replicating magnetic recordings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107121A (en) * 1975-03-17 1976-09-22 Yoshifumi Sakurai HIKARIJIKI KIROKU HOSHIKI
JPS5332009A (en) * 1976-09-06 1978-03-25 Univ Tohoku Vertical magnetic recording reproducing magnetic head
JPS5421709A (en) * 1977-07-19 1979-02-19 Fuji Photo Film Co Ltd Thermomagnetic recording system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200407A (en) * 1982-05-18 1983-11-22 Olympus Optical Co Ltd Magneto-optical recording and reproducing device
US4862437A (en) * 1984-10-26 1989-08-29 Nec Corporation Magneto-optical recording reproducing, and erasing apparatus having two independent magnetic field applying devices
US4706232A (en) * 1985-10-17 1987-11-10 Olympus Optical Co., Ltd. Optical recording and reproducing apparatus

Also Published As

Publication number Publication date
DE3009978C2 (en) 1985-06-20
DE3009978A1 (en) 1980-09-18
JPS6217282B2 (en) 1987-04-16

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