| 摘要 |
PURPOSE:To easily produce the title perpendicular magnetic recording medium capable of recording and reproducing with high efficiency by successively forming a Co-O based in-plane magnetized film and a Co-O based perpendicular magnetized film on a nonmagnetic carrier. CONSTITUTION:The Co-O based in-plane magnetized film 2 and the Co-O based perpendicular magnetized film 3 are successively formed on the nonmagnetic carrier 1. The Co-O based magnetized film 2 beeing formed as the substrate film has a composition of Co-CoO consisting essentially of Co, and is used for facilitating the formation of a closed magnetic circuit between the Co-O based perpendicular magnetized film 3 and a magnetic head in recording and reproducing. As a result, the magnetic interaction is improved, and the recording and reproducing efficiency can be increased. The Co-O based in-plane magnetized film 2 is easily formed by controlling the concn. of the oxygen to be introduced at the time of vapor-depositing high-purity Co on the nonmagnetic carrier 1 to a high concn.
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