Patent ID: 7655325

Claim:
A rare-earth sintered magnet comprising: a magnet body made of an R—Fe—B based rare-earth sintered magnet material, where R is at least one rare-earth element; a metal film on the surface of the magnet body; a plurality of reaction layers disposed between the magnet body and the metal film and including: a first reaction layer, which contacts with at least some of R 2 Fe 14 B type crystals included in the magnet body, to have received the rare-earth element that has been included in the R 2 Fe 14 B type crystals; and a second reaction layer, which is located between the first reaction layer and the metal film and which has a lower rare-earth element concentration than that of the first reaction layer; wherein the second reaction layer has received boron that has been included in the R 2 Fe 14 B type crystals and has a higher boron concentration than that of the first reaction layer.