ALLOY FOR SEED LAYER OF Ni-Cu-BASED MAGNETIC RECORDING MEDIUM, SPUTTERING TARGET MATERIAL, AND MAGNETIC RECORDING MEDIUM

摘要

The objective of the present invention is to provide: an alloy for a seed layer of a Ni-Cu-based magnetic recording medium, the alloy being used for a seed layer in a perpendicular magnetic recording medium; and a sputtering target material. To achieve this objective, the present invention provides a Ni-Cu-M alloy for a seed layer of a magnetic recording medium, the Ni-Cu-M alloy comprising: 1-50 at% Cu; as the M element(s), 2-20 at% of at least one type of M1 element selected from W, Mo, Ta, Cr, V, and Nb, and 0-10 at% of at least one type of M3 element selected from Al, Ga, In, Si, Ge, Sn, Zr, Ti, Hf, B, P, C, and Ru; and Ni and inevitable impurities as the remainder. The present invention also provides a sputtering target material using said alloy, and a magnetic recording medium.