| 摘要 |
Disclosed is a permanent magnet which comprises an alloy containing a hard magnetic phase having a ThMn12 type tetragonal structure and a nonmagnetic phase. The alloy is represented by a general formula given below: <paragraph lvl="0"><in-line-formula>[R1-a(M1)a] [T1-b-c(M2)b(M3)c]dxalpha</in-line-formula>where R is at least one rare earth element (including Y), Ml is at least one element selected from the group consisting of Zr and Hf, T is at least one element selected from the group consisting of Fe, Co and Ni, M2 is at least one element selected from the group consisting of Cu, Bi, Sn, Mg, In and Pb, M3 is at least one element selected from the group consisting of Al, Ga, Ge, Zn, B, P and S, X is at least one element selected from the group consisting of Si, Ti, V, Cr, Mn, Nb, Mo, Ta and W, and the atomic ratios of a, b, c, d and alpha fall within the ranges of 0<=a<=0.6, 0.01<=b<=0.20, 0<=c<=0.05, 6 <=d<=11, and 0.5<=alpha<=2.0.
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