JPS5769542A - Recording medium - Google Patents

Recording medium

Info

Publication number
JPS5769542A
JPS5769542A JP55145118A JP14511880A JPS5769542A JP S5769542 A JPS5769542 A JP S5769542A JP 55145118 A JP55145118 A JP 55145118A JP 14511880 A JP14511880 A JP 14511880A JP S5769542 A JPS5769542 A JP S5769542A
Authority
JP
Japan
Prior art keywords
medium
recording medium
slave
master
magnetic layer
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
JP55145118A
Other languages
Japanese (ja)
Inventor
Tsuneo Yanagida
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 Corp
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 Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP55145118A priority Critical patent/JPS5769542A/en
Priority to DE3140344A priority patent/DE3140344C2/en
Publication of JPS5769542A publication Critical patent/JPS5769542A/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
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • G11B13/045—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties combined recording by magnetic and optic means

Landscapes

  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To obtain a vertical magnetized recording medium utilizing the magneto- optic effect of a good S/N ratio, by using amorphous rare earth -3d transition metal materials and Co-Cr as a slave medium and a master medium respectively.
CONSTITUTION: A master medium 13 consisting of a Co-Cr layer 11 and a low Hc magnetic layer 12 consisting of Fe(Fe-Ni) or the like and a slave medium 17 consisting of a transparent base 16, a magnetic layer 15 consisting of amorphous rare earth -3d transition metal materials (such as TbFe), and a protection film (an SiO film of about several hundredsWseveral thousand Å thickness) 14 are so laminated that the magnetic layer 12 and the protection film 14 are brought into contact with each other, thereby obtaining a recording medium. When the thermis rays 18 are irradiated to this recording medium through the base 16 of the slave medium 17, the slave medium 17 is magnetized vertically by the residual magnetic flux on the surface of the master medium 13, and information of the master medium 13 is transferred to the slave medium 17 thermally and magnetically.
COPYRIGHT: (C)1982,JPO&Japio
JP55145118A 1980-10-17 1980-10-17 Recording medium Pending JPS5769542A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55145118A JPS5769542A (en) 1980-10-17 1980-10-17 Recording medium
DE3140344A DE3140344C2 (en) 1980-10-17 1981-10-10 Recording media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55145118A JPS5769542A (en) 1980-10-17 1980-10-17 Recording medium

Publications (1)

Publication Number Publication Date
JPS5769542A true JPS5769542A (en) 1982-04-28

Family

ID=15377803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55145118A Pending JPS5769542A (en) 1980-10-17 1980-10-17 Recording medium

Country Status (2)

Country Link
JP (1) JPS5769542A (en)
DE (1) DE3140344C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139980A (en) * 1997-07-02 2000-10-31 Fujitsu Limited Reading method of reading information from a recording medium and medium used therefor
WO2002027713A1 (en) * 2000-09-25 2002-04-04 Hitachi Maxell, Ltd. Information recording medium, information recording apparatus, and recording method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE44837T1 (en) * 1985-03-29 1989-08-15 Siemens Ag RECORDING MEDIUM TO BE MAGNETIZED VERTICALLY AND METHOD FOR PRODUCTION THEREOF.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103315A (en) * 1977-06-24 1978-07-25 International Business Machines Corporation Antiferromagnetic-ferromagnetic exchange bias films

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139980A (en) * 1997-07-02 2000-10-31 Fujitsu Limited Reading method of reading information from a recording medium and medium used therefor
WO2002027713A1 (en) * 2000-09-25 2002-04-04 Hitachi Maxell, Ltd. Information recording medium, information recording apparatus, and recording method
JPWO2002027713A1 (en) * 2000-09-25 2004-02-26 日立マクセル株式会社 Information recording medium, information recording device and recording method
US7352658B2 (en) 2000-09-25 2008-04-01 Hitachi Maxell, Ltd. Method for recording information data to a recording medium by irradiation with a light beam and application of a magnetic field

Also Published As

Publication number Publication date
DE3140344A1 (en) 1982-08-19
DE3140344C2 (en) 1984-05-10

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