RARE EARTH SINTERED MAGNET, METHOD FOR MANUFACTURING RARE EARTH SINTERED MAGNET, ROTOR, AND ROTAR

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This rare earth sintered magnet (1) comprises a plurality of main phases (2) having a R2Fe14B crystal structure that contains at least Nd as a rare earth element R, and a grain boundary phase (3) formed between the main phases (2). The grain boundary phase (3) includes a grain boundary phase (3) having : an Sm concentrated portion (4) in which Sm is substituted for a crystalline NdO phase and in which the Sm is concentrated; and a heavy rare earth element RH concentrated portion (5) in which a heavy rare earth element RH is at least partially concentrated at the outer contour of the Sm concentrated portion (4). This makes it possible to further diffuse the heavy rare earth element RH through the interior of the rare earth sintered magnet (1) while suppressing any reduction in magnetic characteristics.