Patent ID: 8211246

Claim:
A permanent magnet comprising a composition represented by a composition formula: (Sm 1-x R x )(Fe p M q Cu r Co 1-p-q-r ) z where, R is at least one element selected from Nd and Pr, M is at least one element selected from Ti, Zr, and Hf, p is a number (atomic ratio) satisfying 0.22≦p≦0.45, q is a number (atomic ratio) satisfying 0.005≦q≦0.05, r is a number (atomic ratio) satisfying 0.01≦r≦0.1, x is a number (atomic ratio) satisfying 0.05≦x≦0.5, z is a number (atomic ratio) satisfying 7≦z≦9, wherein the permanent magnet comprises a Th 2 Zn 17 crystal phase as a main phase, wherein a ratio of I (113) to I (300) is in a range of 0.9≦I (113) /I (300) ≦1.7, where the I (113) is a diffraction peak intensity from a (113) plane of the Th 2 Zn 17 crystal phase in powder X-ray diffraction of the permanent magnet, and the I (300) is a diffraction peak intensity from a (300) plane of the Th 2 Zn 17 crystal phase in the powder X-ray diffraction.