| 摘要 |
PURPOSE:To obtain a high-density magnetic recording medium by forming a magnetic thin film of iron oxide contg. rhenium on a base body. CONSTITUTION:A gamma-Fe3O4 thin film contg. Re or a thin film of an intermediate composition between FE3O4 and gamma-Fe3O4 contg. Re can be obtained by oxidizing an Fe3O4 thin film contg. Re on a base body. The oxidation is prectically carried out in the atmosphere, and the oxidation temp., in this case, in preferably regulated to <=400 deg.C. The content of Re in the iron oxide continuous film is preferably regulated to 1.0-10.0atom% when expressed in terms of Re/FE (atom%). An aluminum base body coated with an Al alloy or alumite or vitreous base body can be exemplified as the hard base body, and a base body consisting of a synthetic resin having excellent resistance to heat such as polyimide, polyester, polyvinyl chloride, polycarbonate, and ''Teflon'' can be exemplified as the flexible base body.
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