| 摘要 |
PROBLEM TO BE SOLVED: To provide an alloy and a sputtering target material for a soft magnetic film layer for use in a magnetic recording medium and having a low saturation magnetic flux density.SOLUTION: The alloy for a soft magnetic thin-film layer in a magnetic recording medium is provided which contains by at%, one or more of Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Ni, Cu, Al, B, C, Si, P, Zn, Ga, Ge and Sn, and the balance comprising Co and Fe, and which satisfies the following formula (1) to (5). (1) 0.50≤Fe%/(Fe%+Co%)≤0.90, (2) 5≤TAM≤23, (3) 18≤TAM+TNM≤23, (4) 0≤(Nb%+Ta%)/(TAM+TNM)≤0.74, (5) 0≤Ti%+Zr%+Hf%+B%/2≤6, where TAM=Y%+Ti%+Zr%+Hf%+V%+Nb%+Ta%+B%/2, TNM=Cr%+Mo%+W%+Mn%+Ni%/3+Cu%/3+Al%+C%+Si%+P%+Zn%+Ga%+Ge%+Sn%. |
