| 摘要 |
PROBLEM TO BE SOLVED: To provide a soft magnetic film layer alloy having a low-saturation magnetic flux density used for magnetic recording medium, and a sputtering target material.SOLUTION: A soft magnetic thin film layer alloy for a magnetic recording medium includes, in at.%, one or more kinds of Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Ni, Cu, Al, B, C, Si, P, Zn, Ga, Ge and Sn, includes Co and Fe as balance, and satisfied the following formulae (1) to (5): (1) 0.65≤Fe%/(Fe%+Co%)≤0.80; (2) 5≤TAM≤19; (3) 15≤TAM+TNM≤19; (4)0≤(Nb%+Tt%)/(TAM+TNM)≤0.74; and (5) 0≤Ti%+Zr%+Hf%+B%/2≤5, however, TAM=Y%+Ti%+Zr%+Hf%+V%+Nb%+Ta%+B%/2, and TNM=Cr%+Mo%+W%+Mn%+Ni%/3+Cu%/3+Al%+C%+Si%+P%+Zn%+Ga%+Ge%+Sn%. |
