| 摘要 |
PURPOSE:To obtain a thin metallic film type magnetic recording medium having excellent durability and corrosion resistance by providing a magnetic layer consisting of an alloy contg. Co as an essential component on a nonmagnetic base and protective layer consisting of an oxide of a Co-Re alloy thereon. CONSTITUTION:The magnetic layer 2 consisting of Co, Co-Cr, Co-V, Co-Mo, Co-W or other alloys contg. Co as the essential component is provided on the nonmagnetic substrate 1. The protective layer 3 formed by partially oxidizing the Co-Re alloy is provided thereon. The ratio of the Re atoms incorporated into the protective layer 3 to the total number of the Co atoms and Re atoms is adequately 5-50%, more preferably 10-50%. The thickness of the layer 3 is 30-500Angstrom , more preferably 30-200Angstrom . The durability is improved by executing vapor deposition in such a manner that the C-axis of the magnetic layer 2 is oriented perpendicularly to the medium plane.
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