JPS57186208A - Vertical thermomagnetic recording method - Google Patents

Vertical thermomagnetic recording method

Info

Publication number
JPS57186208A
JPS57186208A JP7041981A JP7041981A JPS57186208A JP S57186208 A JPS57186208 A JP S57186208A JP 7041981 A JP7041981 A JP 7041981A JP 7041981 A JP7041981 A JP 7041981A JP S57186208 A JPS57186208 A JP S57186208A
Authority
JP
Japan
Prior art keywords
point
magnetization
temperature
recording medium
compensating
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
JP7041981A
Other languages
Japanese (ja)
Inventor
Motoharu Tanaka
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7041981A priority Critical patent/JPS57186208A/en
Publication of JPS57186208A publication Critical patent/JPS57186208A/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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/10528—Shaping of magnetic domains, e.g. form, dimensions

Abstract

PURPOSE:To enable high recording density, by heating a minute part on a recording medium at a compensating point or more, moving this minute part, magnetizing the part while the temperature falls down near the compensating point and keeping the magnetization around the compensating point. CONSTITUTION:A recording medium 13 is moved toward the arrow in high speed. Assuming a moving distance at a point P as X, when thermal wire spot is irradiated, the thermal wire spot part (heated to a compensating point or more) as shown in the dotted line circle (a) in the enlarged view for the point P is moved toward the arrow by DELTAx after DELTAt and comes to a solid line circle in (b). Thus, the temperature at the hatched part is decreased. In this case, since the coercive force of a magnetic substance film of the recording medium 13 is small, magnetization is made toward the direction of magnetic field of a coil 14 and when the temperature of the magnetic substance film closes to a room temperature, the coercive force of the magnetic substance film is rapidly increased and since the direction of magnetization of the hatched part (c) is not subject to the operation of the coil 14 afterward, the recording with a smaller than the spot can be made.
JP7041981A 1981-05-11 1981-05-11 Vertical thermomagnetic recording method Pending JPS57186208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7041981A JPS57186208A (en) 1981-05-11 1981-05-11 Vertical thermomagnetic recording method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7041981A JPS57186208A (en) 1981-05-11 1981-05-11 Vertical thermomagnetic recording method

Publications (1)

Publication Number Publication Date
JPS57186208A true JPS57186208A (en) 1982-11-16

Family

ID=13430930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7041981A Pending JPS57186208A (en) 1981-05-11 1981-05-11 Vertical thermomagnetic recording method

Country Status (1)

Country Link
JP (1) JPS57186208A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107810A (en) * 1975-03-19 1976-09-24 Matsushita Electric Ind Co Ltd JIKIKIROKU SOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107810A (en) * 1975-03-19 1976-09-24 Matsushita Electric Ind Co Ltd JIKIKIROKU SOCHI

Similar Documents

Publication Publication Date Title
JPS5778652A (en) Thermal magnetic recording carrier and thermal magnetic recording system
JPS57113402A (en) Method and device for vertical thermomagnetic recording
JPS55122244A (en) Photomagnetic recording and reproducing method
JPS5792446A (en) Recording, reproduction and erasure system for information using photomagnetic recording medium
JPS57164418A (en) Vertical heat magnetic recording medium
JPS57186208A (en) Vertical thermomagnetic recording method
JPS5661032A (en) Optical magnetic recording medium
JPS5633810A (en) Preparation of magnetic recording medium
JPS57186214A (en) Vertical thermomagnetic recording method
JPS57186209A (en) Vertical thermomagnetic recording system
JPS56163528A (en) Recording and erasing method of optical information
JPS5225688A (en) Hot ultrasonic probe
JPS5724047A (en) Recorder and reproducer
JPS57183605A (en) Vertical magnetic recording and reproducing system
JPS57147130A (en) Magnetic recording medium
JPS57114646A (en) Heat treatment of amorphous magnetic alloy
JPS5736435A (en) Vertical magnetizing medium
JPS5778604A (en) Recording readout method
JPS57117123A (en) Magnetic recoding body
JPS5419200A (en) Magnetic recording medium process
JPS6470945A (en) Writing reading method for magneto-optical recording medium
JPS5330800A (en) Peparing magnetic thin film
JPS55146609A (en) Recording and reproducing device for magnetic card of lamination of temperature sensing magnetic material
JPS554730A (en) Thin film magnetic head for vertical magnetic recording
JPS57169906A (en) Vertical thermal magnetic recording method