Cu-BASED MAGNETIC RECORDING ALLOY, SPUTTERING TARGET MATERIAL, AND PERPENDICULAR MAGNETIC RECORDING MEDIUM USING THE Cu-BASED MAGNETIC RECORDING ALLOY

摘要

PROBLEM TO BE SOLVED: To provide a Cu-based magnetic recording alloy for a heat sink layer used for a thermally assisted magnetic recording medium, to provide a sputtering target material, and to provide a perpendicular magnetic recording medium using the Cu-based magnetic recording alloy.SOLUTION: A Cu-based magnetic recording alloy includes 1 to 23.4 atom% of one kind or two kinds or more of Cr, Mo and W, the balance of Cu and inevitable impurities. The Cu-based magnetic recording alloy also includes 0.2 to 5 atom% of one kind or two kinds or more of Al, Si, Zn, Mn and Ni. Further, the Cu-based magnetic recording alloy includes 0.1 to 1 atom% of one kind or two kinds or more of Y, La, Ce, Nb, Sm, Gd, Tb and Dy. A sputtering target material and a perpendicular magnetic recording medium include any of the Cu-based magnetic recording alloys.