| 摘要 |
A double-layer perpendicular magnetic recording medium suitable for high density recording is obtained. In one embodiment, a granular recording medium is formed on a undercoating layer, in which a first metal composed of Pt, Pd, or an alloy thereof and a second metal composed of Cr or V are included and their composition is 15%<B/(A+B)<30% when the atomic fraction of the first metal is assumed to be A and the atomic fraction of the second metal is assumed to be B.
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