| 摘要 |
PROBLEM TO BE SOLVED: To improve magnetic interaction among the grains of a granular magnetic recording layer, and to provided a vertical magnetic record medium that can perform high-density recording with low noise. SOLUTION: The vertical magnetic record medium has a structure, where a foundation layer 2, a magnetic recording layer 3, and a protective film 4 are successively formed on a non-magnetic substrate 1, and a liquid lubricant layer 5 is formed on the structure. In the magnetic recording layer 3, there are a crystal grain having ferromagnetism and a non-magnetic grain boundary surrounding the crystal grain, and the non-magnetic grain boundary uses the granular magnetic recording layer which is a non-magnetic nonmetal. The surface of the foundation layer 2, before forming the magnetic recording layer 3, is exposed in the atmosphere of O<SB>2</SB>or N<SB>2</SB>or the atmosphere of a mixed gas, where O<SB>2</SB>or N<SB>2</SB>is added to a rare gas, and O<SB>2</SB>or N<SB>2</SB>is made to accompany as a nucleus for use in non-magnetic nonmetal formation. After that, magnetic recording layer 3 is formed, the ferromagnetic crystal grain and the non-magnetic nonmetal grain boundary are formed from an initial layer, and the magnetic recording layer, having a satisfactory segregated structure, can be formed. COPYRIGHT: (C)2004,JPO
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