Patent ID: 9583243
Date: 2017-02-28
CPC Classifications: C21D,C22C,H01F

Claim:
1. A permanent magnet comprising: a composition expressed by the following composition formula: wherein M is at least one element selected from the group consisting of Ti, Zr, and Hf, wherein a content of Ti is 10 atomic % or less of the element M, A is at least one element selected from the group consisting of Ni, V, Cr, Mn, Al, Nb, Ta, and W, p is a number, which is an atomic ratio, satisfying 0.31≦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≦0.15, s is a number, which is an atomic ratio, satisfying 0≦s≦0.2, z is a number, which is an atomic ratio, satisfying 4≦z≦9; and a structure which comprises a Th wherein an average interval d between the copper-rich phases in a cross section including a crystal c axis of the Th wherein a magnetic coercive force of the permanent magnet is from 100 to 500 kA/m, and a residual magnetization of the permanent magnet is 1.17 T or more.