JPS5771515A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5771515A
JPS5771515A JP55145166A JP14516680A JPS5771515A JP S5771515 A JPS5771515 A JP S5771515A JP 55145166 A JP55145166 A JP 55145166A JP 14516680 A JP14516680 A JP 14516680A JP S5771515 A JPS5771515 A JP S5771515A
Authority
JP
Japan
Prior art keywords
value
layer
saturation magnetization
recording medium
magnetic recording
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
JP55145166A
Other languages
Japanese (ja)
Other versions
JPH038006B2 (en
Inventor
Ryuji Sugita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55145166A priority Critical patent/JPS5771515A/en
Priority to EP81300905A priority patent/EP0036717A1/en
Priority to US06/240,368 priority patent/US4429016A/en
Publication of JPS5771515A publication Critical patent/JPS5771515A/en
Publication of JPH038006B2 publication Critical patent/JPH038006B2/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
    • 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
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers

Landscapes

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

Abstract

PURPOSE:To improve coercive force and corrosion resistance by forming a magnetic layer in such a way that the value of the saturation magnetization of the magnetic layer is made larger than the value of the saturation magnetization of bulk of the same composition in a magnetic recording medium having the magnetic layer consisting essentially of Co and Cr. CONSTITUTION:In producing a magnetic recording medium 6 by forming a magnetic thin film 7 having an easy-to-magnetize axis in the perpendicular direction of the film and consisting essentially of Co and Cr on a nonmagnetic base material 2 by a vacuum deposition method, conditions such as the atmosphere at the vapor deposition, the forming speed of the film 7, and the temp. of the material 2 are controlled, whereby the layer 7 is formed in such a way that the value of the saturation magnetization of the layer 7 has the value larger than the value of the saturation magnetization of the bulk having the same composition as the average value of the composition of the layer 7, and the intended magnetic recording medium is obtained. It is possible to increase the value of the saturation magnetization of the layer 7 by lowering the gaseous Ar pressure at the vapor deposition or increasing the temp. of the material 2.
JP55145166A 1980-03-07 1980-10-16 Magnetic recording medium Granted JPS5771515A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55145166A JPS5771515A (en) 1980-10-16 1980-10-16 Magnetic recording medium
EP81300905A EP0036717A1 (en) 1980-03-07 1981-03-04 Magnetic recording medium
US06/240,368 US4429016A (en) 1980-03-07 1981-03-04 Magnetic recording medium with vacuum deposited magnetic layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55145166A JPS5771515A (en) 1980-10-16 1980-10-16 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5771515A true JPS5771515A (en) 1982-05-04
JPH038006B2 JPH038006B2 (en) 1991-02-05

Family

ID=15378948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55145166A Granted JPS5771515A (en) 1980-03-07 1980-10-16 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5771515A (en)

Also Published As

Publication number Publication date
JPH038006B2 (en) 1991-02-05

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