MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION

PURPOSE:To obtain a magnetic recording medium having the large coercive force in the direction perpendicular to the film plane and large vertical anisotropic magnetic field by adjusting the chromium content in a thin magnetic film contg. cobalt and chromium on a non-magnetic substrate to 18-24wt% an...

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Bibliographic Details
Main Authors ARAI HITOSHI, OKAYAMA HIROSHI, IZUMI TOSHIAKI
Format Patent
LanguageEnglish
Published 25.12.1986
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PHYSICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PURPOSE:To obtain a magnetic recording medium having the large coercive force in the direction perpendicular to the film plane and large vertical anisotropic magnetic field by adjusting the chromium content in a thin magnetic film contg. cobalt and chromium on a non-magnetic substrate to 18-24wt% and segregation rate to >=20%. CONSTITUTION:The chromium content in the thin magnetic film contg. cobalt and chromium on the non-magnetic substrate is adjusted to 18-24wt% and the segregation rate to >=20%. The vertical anisotropic magnetic field decreases when the chromium content is below 20% and the coercive force Hcrt. angle in the direction perpendicular to the film plane decreases when said content exceeds 24%. The coercive force decreases when the segregation rate exceeds 40%. The recording medium of the thin magnetic film having the large coercive force in the direction perpendicular to the film plane and large vertical anisotropic magnetic field is thus obtd.
Bibliography:Application Number: JP19850135566