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US 6,607,807 B2Granted
Ferromagnetic metal powder and magnetic recording medium using the same
AssigneeFuji Photo Film Co., Ltd.
InventorsNoboru Zinbo, Toshihiko Miura
Life of this patent
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Abstract
A ferromagnetic metal powder comprises: a metal portion comprising Fe; and an oxide layer around the metal portion, wherein the oxide layer comprises an iron oxide having magnetism such that the saturation magnetization is from 50 to 95 A.m2/kg.
Claims14
A ferromagnetic metal powder comprising:
- a metal portion comprising Fe;
- and
- an oxide layer around the metal portion,
- wherein said oxide layer comprises a magnetic oxide and a non-magnetic oxide, the magnetic oxide comprising an iron oxide having magnetism such that the saturation magnetization is from 50 to 95 A.m2/kg, and wherein the non-magnetic oxide comprises Y in an amount of 20% by weight (mass) or less based upon Fe.
1 more element
Dependencies are inferred from the claim text.