| 摘要 |
PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium satisfying all conditions of a soft magnetic backing film which has high saturation magnetic flux density and excellent soft magnetic characteristics and controlled magnetic anisotropy, an intermediate film which has thin film thickness, and a recording film which has satisfactory perpendicular magnetic anisotropy. SOLUTION: The perpendicular magnetic recording medium has a first under film represented by Ta, a second under film represented by Pt, a Mn based alloy film, the soft magnetic backing film represented by general formula (Fe<SB>x</SB>Co<SB>1-x</SB>)<SB>y</SB>(A)<SB>1-y</SB>(wherein, x and 1-y are in the range of 0.6≤x≤0.8 and 0≤1-y≤0.3 and A denotes a single metal, an alloy, an oxide or a nitride containing at least one element selected from the group consisting of B, C, Mg, Al, Si, Ti, V, Cr, Mn, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, In, Hf, Ta, W, Ir, Pt, and Au), the intermediate film and the recording film having perpendicular magnetic anisotropy. COPYRIGHT: (C)2007,JPO&INPIT
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