CPC H01F 41/0293 (2013.01) [B22F 3/26 (2013.01); C22C 1/04 (2013.01); C22C 28/00 (2013.01); C22F 1/16 (2013.01); H01F 1/0577 (2013.01); B22F 2003/248 (2013.01); B22F 2301/45 (2013.01); C22C 2202/02 (2013.01)] | 6 Claims |
1. A sintered R-T-B based magnet, comprising:
R (R is a rare-earth element and contains, with no exception, at least one selected from the group consisting of Nd, Pr and Ce);
T (T is at least one selected from the group consisting of Fe, Co, Al, Mn and Si, and contains Fe with no exception);
B; and
at least one selected from the group consisting of Cu, Ga, Ni, Ag, Zn and Sn,
wherein a molar ratio [T]/[B] of T with respect to B in a surface region of the sintered R-T-B based magnet is lower than a molar ratio [T]/[B] of T with respect to B in a central region of the sintered R-T-B based magnet.
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