| 摘要 |
PROBLEM TO BE SOLVED: To provide a CoFe-based alloy for soft magnetic thin film layers in perpendicular magnetic recording media; and to provide a sputtering target material.SOLUTION: An alloy for soft magnetic film layers in perpendicular magnetic recording media is formed of one or more elements selected from among Ge, Ru, Rh, Pd, Re, Os, Ir and Pt, and one or more elements selected from among Sc, Y, lanthanoids (atomic numbers 57 to 71), Ti, Zr, Hf, V, Nb, Ta, Mo, W and B, with the balance made up of Co, Fe and unavoidable impurities. This alloy satisfies, by atom, all of the following formulae (1) to (4): (1) 0.1%≤TCR≤10%; (2) 5%≤TAM≤25%; (3) 13%≤TCR/2+TAM+TNM≤25%; and (4) 0≤Fe%/(Fe%+Co%)≤0.80. |
