JPS5788524A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5788524A
JPS5788524A JP55164896A JP16489680A JPS5788524A JP S5788524 A JPS5788524 A JP S5788524A JP 55164896 A JP55164896 A JP 55164896A JP 16489680 A JP16489680 A JP 16489680A JP S5788524 A JPS5788524 A JP S5788524A
Authority
JP
Japan
Prior art keywords
thin plate
alloy thin
substance layer
recording medium
magnetic
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
JP55164896A
Other languages
Japanese (ja)
Inventor
Norishige Yamaguchi
Masaru Takayama
Masao Shigeta
Masatatsu Sugaya
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP55164896A priority Critical patent/JPS5788524A/en
Publication of JPS5788524A publication Critical patent/JPS5788524A/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

Abstract

PURPOSE:To achieve a high-output and high-density recording medium with high manufacturing yield, by forming a hard ferromagnetic substance layer including Fe, Ni, and Cr on or near an alloy thin plate surface so that the lower side of the layer is distinguished magnetically. CONSTITUTION:The medium is a magnetic recording medium made of an alloy thin plate, and the ion concentration of the specified atoms out of atoms constituting this alloy thin plate changes in the thickness direction of the thin plate. As a result of the concentration change, a hard ferro-magnetic substance layer including Fe, Ni and Cr on or near the surface of the alloy thin plate and having 100Angstrom -1mum thickness of >=2,500e corecive force is formed with magnetic distinction from the lower part. Further, the said hard ferromagnetic substance layer is formed so that the upper and lower parts are distinguished magnetically and a layer made of chromium oxide is formed on the upper part of this hard ferromagnetic substance layer is formed, allowing to improve the corrosion resistance and to increase the wear resistance.
JP55164896A 1980-11-24 1980-11-24 Magnetic recording medium Pending JPS5788524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55164896A JPS5788524A (en) 1980-11-24 1980-11-24 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55164896A JPS5788524A (en) 1980-11-24 1980-11-24 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5788524A true JPS5788524A (en) 1982-06-02

Family

ID=15801919

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55164896A Pending JPS5788524A (en) 1980-11-24 1980-11-24 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5788524A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201224A (en) * 1983-04-28 1984-11-14 Fuji Photo Film Co Ltd Magnetic recording medium
JPS63254708A (en) * 1987-04-10 1988-10-21 Matsushita Electric Ind Co Ltd Magnetic alloy film containing nitrogen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201224A (en) * 1983-04-28 1984-11-14 Fuji Photo Film Co Ltd Magnetic recording medium
JPS63254708A (en) * 1987-04-10 1988-10-21 Matsushita Electric Ind Co Ltd Magnetic alloy film containing nitrogen

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