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 substrate and protective layer consisting of an oxide of a Co-Cd mixture 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 consisting of the oxide of the Co-Cd mixture is provided thereon. The ratio of the Cd atoms incorporated into the layer 3 to the total number of the Co atoms and Cd atoms is adequately 0.3-35%, more preferably 5-35%. 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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