| 摘要 |
<p>Provided is an alloy for a soft-magnetic thin-film layer on a perpendicular magnetic recording medium with low coercivity. Said alloy contains the following: at least one element selected from the group consisting of titanium, zirconium, hafnium, niobium, tantalum, and boron; tungsten and/or tin (although vanadium and/or manganese may be substituted for some or all of said tungsten and/or tin); as desired, at least one element selected from the group consisting of aluminum, chromium, molybdenum, silicon, phosphorus, carbon, and germanium; and nickel and/or copper as desired. The remainder of the alloy comprises cobalt and iron. The composition of the alloy satisfies the following relations, with each symbol representing the atomic percent of the corresponding element: (1) 6 = Ti+Zr+Hf+Nb+Ta+B/2 = 24; (2) Zr+Hf = 14; (3) 3 = W+Sn = 19; (4) 0.20 = Fe/(Fe+Co) = 0.90; (5) 3 = W+Sn+V+Mn = 19 (V+Mn may be 0); (6) 0 = Al+Cr+Mo+Si+P+C+Ge = 9; and (7) 0 = Ni+Cu = 5.</p> |
