JPS5794948A - Photomagnetic recording medium - Google Patents

Photomagnetic recording medium

Info

Publication number
JPS5794948A
JPS5794948A JP55170239A JP17023980A JPS5794948A JP S5794948 A JPS5794948 A JP S5794948A JP 55170239 A JP55170239 A JP 55170239A JP 17023980 A JP17023980 A JP 17023980A JP S5794948 A JPS5794948 A JP S5794948A
Authority
JP
Japan
Prior art keywords
ratio
recording medium
amorphous
decreasing
sum
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
JP55170239A
Other languages
Japanese (ja)
Other versions
JPS6131533B2 (en
Inventor
Shinsuke Tanaka
Osatake Imamura
Chuichi Oota
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP55170239A priority Critical patent/JPS5794948A/en
Publication of JPS5794948A publication Critical patent/JPS5794948A/en
Publication of JPS6131533B2 publication Critical patent/JPS6131533B2/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
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature

Landscapes

  • Thin Magnetic Films (AREA)

Abstract

PURPOSE:To raise Curie temperature without decreasing a Kerr rotating angle by forming an amorphous four-dimensional alloy thin film by using Gd, Dy, Tb, and Fe while specifying the atom ratio of the sum of Gd, Dy and Tb and the ratio of Gd and Dy within prescribed ranges respectively. CONSTITUTION:An amorphous four-dimensional alloy thin film which has an easy magnetization axis perpendicular to the film surface is formed by Gd, Dy, Tb, and Fe. In this case, the atom ratio of the sum of Gd, Dy and Tb is set to 15-35atom%, and the ratio of Gd and Dy is set to 0-50atom%. Consequently, a Curie temperature is raised without decreasing a Kerr rotating angle, thereby improving an S/N ratio and recording density.
JP55170239A 1980-12-04 1980-12-04 Photomagnetic recording medium Granted JPS5794948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55170239A JPS5794948A (en) 1980-12-04 1980-12-04 Photomagnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55170239A JPS5794948A (en) 1980-12-04 1980-12-04 Photomagnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5794948A true JPS5794948A (en) 1982-06-12
JPS6131533B2 JPS6131533B2 (en) 1986-07-21

Family

ID=15901241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55170239A Granted JPS5794948A (en) 1980-12-04 1980-12-04 Photomagnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5794948A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5917222A (en) * 1982-07-21 1984-01-28 Hitachi Ltd Manufacture of multilayer magnetic thin-film
JPS59178641A (en) * 1983-03-29 1984-10-09 Kokusai Denshin Denwa Co Ltd <Kdd> Photomagnetic recording medium
JPS60107751A (en) * 1983-11-17 1985-06-13 Canon Inc photothermal magnetic recording medium
JPS60251540A (en) * 1984-05-26 1985-12-12 Ricoh Co Ltd Amorphous magnetooptic layer
JPS616808A (en) * 1984-06-20 1986-01-13 Oki Electric Ind Co Ltd Photomagnetic recording material
US4838962A (en) * 1985-07-12 1989-06-13 Hitachi, Ltd. Magneto-optical recording medium
JPH06342538A (en) * 1993-10-12 1994-12-13 Daicel Chem Ind Ltd Magneto-optical recording disk and its production

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5917222A (en) * 1982-07-21 1984-01-28 Hitachi Ltd Manufacture of multilayer magnetic thin-film
JPS59178641A (en) * 1983-03-29 1984-10-09 Kokusai Denshin Denwa Co Ltd <Kdd> Photomagnetic recording medium
JPS60107751A (en) * 1983-11-17 1985-06-13 Canon Inc photothermal magnetic recording medium
JPS60251540A (en) * 1984-05-26 1985-12-12 Ricoh Co Ltd Amorphous magnetooptic layer
JPS616808A (en) * 1984-06-20 1986-01-13 Oki Electric Ind Co Ltd Photomagnetic recording material
US4838962A (en) * 1985-07-12 1989-06-13 Hitachi, Ltd. Magneto-optical recording medium
JPH06342538A (en) * 1993-10-12 1994-12-13 Daicel Chem Ind Ltd Magneto-optical recording disk and its production

Also Published As

Publication number Publication date
JPS6131533B2 (en) 1986-07-21

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