| 摘要 |
PURPOSE:To obtain a magnetic recording medium having excellent corrosion resistance, good magnetic characteristics and excellent noise characteristic by providing a thin magnetic film contg. Ni, Ru, and Zr respectively at specified atomic ratios and consisting of the balance Co. CONSTITUTION:This magnetic recording medium has the thin magnetic film essentially consisting of Co and contg. 15-30at% Ni, 0.1-5at% Ru, and 0.1-5at% Zr. The squareness ratio is inferior if Ni is <15at% and the decreased satd. magnetic flux density and output are caused if Ni exceeds 30at%. The corrosion resistance and noise characteristic are inferior if Ru is <0.1at% and the squareness ratio is poor if Ru exceeds 5at%. The noise characteristic is inferior if Zr is <0.1at% and the decreased satd. magnetic flux density and output are caused if Zr exceeds 5at%.
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