JPS57195325A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57195325A
JPS57195325A JP56079703A JP7970381A JPS57195325A JP S57195325 A JPS57195325 A JP S57195325A JP 56079703 A JP56079703 A JP 56079703A JP 7970381 A JP7970381 A JP 7970381A JP S57195325 A JPS57195325 A JP S57195325A
Authority
JP
Japan
Prior art keywords
film
recording medium
magnetic recording
over
sputtering
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
JP56079703A
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 JP56079703A priority Critical patent/JPS57195325A/en
Publication of JPS57195325A publication Critical patent/JPS57195325A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/656—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Co

Landscapes

  • Magnetic Record Carriers (AREA)
  • Thin Magnetic Films (AREA)

Abstract

PURPOSE:To increase vertical coercive force even when a film is thin, by providing a Co thin film over a substrate. CONSTITUTION:Over a substrate 1, a Co magnetic thin film 2 is formed by vapor deposition, ion plating, or sputtering to >=500 angstrom thickness. Over the film, a Co-Cr vertically magnetized film 3 which contains 10-20wt% Cr is formed by vapor deposition, ion plating, or sputtering to 500-5,000 angstrom thickness.
JP56079703A 1981-05-26 1981-05-26 Magnetic recording medium Pending JPS57195325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079703A JPS57195325A (en) 1981-05-26 1981-05-26 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079703A JPS57195325A (en) 1981-05-26 1981-05-26 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57195325A true JPS57195325A (en) 1982-12-01

Family

ID=13697561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079703A Pending JPS57195325A (en) 1981-05-26 1981-05-26 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57195325A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4722869A (en) * 1985-07-03 1988-02-02 Hitachi, Ltd. Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4722869A (en) * 1985-07-03 1988-02-02 Hitachi, Ltd. Magnetic recording medium

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