Magnetic recording medium
AssigneeTDK Corporation
InventorsKiminori Tamai, Kiyotaka Okuyama, Shigeo Kurose
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Abstract
A magnetic recording medium includes a non-magnetic support and a magnetic layer, The magnetic layer comprises a binder and a Co-containing iron-based metal powder dispersed in the binder, characterized in that particles of the metal powder have a greater Co concentration in their surface layer than their inside of the particles, The Co-containing metal powder is easily dispersed in a binder and provides high Br/Bm and orientation. If Ba is contained in the starting powder the localization of Co in the surface area is realized.
Claims2
A magnetic recording medium including a non-magnetic support and a magnetic layer, said magnetic layer comprising a binder and a barium (dash) containing iron-based metal powder dispersed in the binder, wherein particles of the metal powder are formed by reduction of barium-containing iron oxide at about 400.degree. to 600.degree. C. and contain cobalt with a greater concentration in their surface layer than inside of the particles.
Dependencies are inferred from the claim text.