JPS5717114A - Magnetic medium for vertical magnetic recording - Google Patents

Magnetic medium for vertical magnetic recording

Info

Publication number
JPS5717114A
JPS5717114A JP9252880A JP9252880A JPS5717114A JP S5717114 A JPS5717114 A JP S5717114A JP 9252880 A JP9252880 A JP 9252880A JP 9252880 A JP9252880 A JP 9252880A JP S5717114 A JPS5717114 A JP S5717114A
Authority
JP
Japan
Prior art keywords
magnetic
medium
magnetic field
alloy
vertical
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
JP9252880A
Other languages
Japanese (ja)
Inventor
Tadaharu Tomita
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha 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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP9252880A priority Critical patent/JPS5717114A/en
Publication of JPS5717114A publication Critical patent/JPS5717114A/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
    • G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide

Abstract

PURPOSE:To enhance the anisotropic magnetic field without reducing saturated magnetic flux and to improve the quality of a magnetic medium for vertical magnetic recording by a method wherein Co alloy is used to manufacture the medium. CONSTITUTION:For enhancement of magnetic anisotropy by forming an alloy with Co, it is effective to use rare earth metals, and for example, SmCo5 or Sm2Co17, etc., being the alloy with Sm are useful, and it is desirable to make HA/4piMS (HA: anisotropic magnetic field, MS: saturated magnetic field) as 1.5-10. Therefore to add a little Fe is also effective. Accordingly anisotropic magnetic field can be enhanced without reducing saturated magnetic flux, and quality can be improved.
JP9252880A 1980-07-07 1980-07-07 Magnetic medium for vertical magnetic recording Pending JPS5717114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9252880A JPS5717114A (en) 1980-07-07 1980-07-07 Magnetic medium for vertical magnetic recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9252880A JPS5717114A (en) 1980-07-07 1980-07-07 Magnetic medium for vertical magnetic recording

Publications (1)

Publication Number Publication Date
JPS5717114A true JPS5717114A (en) 1982-01-28

Family

ID=14056841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9252880A Pending JPS5717114A (en) 1980-07-07 1980-07-07 Magnetic medium for vertical magnetic recording

Country Status (1)

Country Link
JP (1) JPS5717114A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6016409A (en) * 1983-07-08 1985-01-28 Yoshifumi Sakurai Vertical magnetization film
JPS61228402A (en) * 1985-03-29 1986-10-11 ピーピージー　インダストリーズ　インコーポレーテツド Photochromic plastic product and manufacture thereof
JPH03286420A (en) * 1990-03-30 1991-12-17 Matsushita Electric Ind Co Ltd Magnetic recording medium
US7090934B2 (en) * 1998-08-28 2006-08-15 Hoya Corporation Perpendicular magnetic recording medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6016409A (en) * 1983-07-08 1985-01-28 Yoshifumi Sakurai Vertical magnetization film
JPS61228402A (en) * 1985-03-29 1986-10-11 ピーピージー　インダストリーズ　インコーポレーテツド Photochromic plastic product and manufacture thereof
JPH0445801B2 (en) * 1985-03-29 1992-07-28 Ppg Industries Inc
JPH03286420A (en) * 1990-03-30 1991-12-17 Matsushita Electric Ind Co Ltd Magnetic recording medium
US7090934B2 (en) * 1998-08-28 2006-08-15 Hoya Corporation Perpendicular magnetic recording medium

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