Patent ID: 8568539

Claim:
A permanent magnet comprising a sintered body having a composition represented by the following composition formula: R(Fe p M q Cu r Co 1-p-q-r ) z O w , wherein R is at least one element selected from the group consisting of rare-earth elements, M is at least one element selected from the group consisting of Ti, Zr and Hf, p is a number, which is an atomic ratio, satisfying 0.25≦p≦0.6, q is a number, which is an atomic ratio, satisfying 0.005≦q≦0.1, r is a number, which is an atomic ratio, satisfying 0.01≦r≦0.1, z is a number, which is an atomic ratio, satisfying 4≦z≦9, and w is a number, which is an atomic ratio, satisfying 0.005≦w≦0.6, wherein aggregates of oxides containing the element R are substantially uniformly dispersed in the sintered body.