Soft magnetic alloy for magnetic recording medium, sputtering target material, and magnetic recording medium
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United States of America Patent
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Dec 8, 2015
Grant Date -
Aug 29, 2013
app pub date -
Aug 19, 2011
filing date -
Aug 24, 2010
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Abstract
There is provided a soft magnetic alloy for a perpendicular magnetic recording medium having a low coercive force, high amorphous properties, high corrosion resistance, and a high hardness; and a sputtering target for producing a thin film of the alloy. The alloy comprises in at. %: 6 to 20% in total of one or two of Zr and Hf; 1 to 20% of B; and 0 to 7% in total of one or two or more of Ti, V, Nb, Ta, Cr, Mo, W, Ni, Al, Si, and P; and the balance Co and/or Fe and unavoidable impurities. The alloy further satisfies 6≦2×(Zr%+Hf%)−B%≦16 and 0≦Fe%/(Fe%+Co%)<0.20.
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