PHOTOMAGNETIC RECORDING MEDIUM

Title:

PHOTOMAGNETIC RECORDING MEDIUM

Document Type and Number:

Japanese Patent JPS61115259

Kind Code:

A

Abstract:

PURPOSE: To obtain a film having large coercive force at a low cost by forming a recording film of magnetic garnet having a significant magneto-optical effect and oxidation stability on a heat resistant substrate having a specified coefft. of thermal expansion.

CONSTITUTION: A polycrystal film of bismuth substituted garnet represented by the formula is formed on a heat resistant hard substrate of optically isotropic glass, ceramics or the like having 4.0×10-6W1.3×10-5/°C coefft. of thermal expansion and proof against 600°C. When the coefft. (α) of thermal expansion of the substrate is within said range at ordinary temp., the film is hardly cracked or roughened, and a film having large coercive force is obtd.

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Inventors:

SHONO KEIJI
OKADA SEIJI
MIYAZAKI MASAHIRO
OGAWA SEIYA

Application Number:

JP23664584A

Publication Date:

June 02, 1986

Filing Date:

November 12, 1984

Export Citation:

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Assignee:

FUJITSU LTD

International Classes:

C01G49/00; G11B11/10; G11B11/105; G11C13/06; H01F10/24; (IPC1-7): C01G49/00; G11B11/10; G11C13/06; H01F10/24

Attorney, Agent or Firm:

Aoki Akira

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