SINTERED R-TM-B MAGNET

A sintered R-TM-B magnet comprising 24.5-34.5% by mass of R, wherein R is at least one selected from rare earth elements including Y, 0.92-1.15% by mass of B, less than 0.1% by mass of Ni, 0.07-0.5% by mass of Ga, 0-0.4% by mass of Cu, and inevitable impurities, the balance being Fe; the amounts (% by mass) of Ga and Cu being in a region of a pentagon defined by a point A (0.5, 0.0), a point B (0.5, 0.4), a point C′ (0.1, 0.4), a point D′ (0.1, 0.1) and a point E (0.2, 0.0), on an X-Y plane in which the X-axis represents the amount of Ga, and the Y-axis represents the amount of Cu.