| 简介 |
In an embodiment, a permanent magnet includes a composition of R (FepMqCur(Co1-sAs)1-p-q-r)z (R : rare earth element, M : Ti, Zr, Hf, A : Ni, V, Cr, Mn, Al, Si, Ga, Nb, Ta, W, 0.05≦p 0.6, 0.005≦q≦0.1, 0.01≦r≦0.15, 0≦s≦0.2, 4≦z≦9). The permanent magnet includes a two-phase structure of a Th2Zn17 crystal phase and a copper-rich phase. An average interval between the copper-rich phases in a cross section including a crystal c axis of the Th2Zn17 crystal phase is in a range of over 120 nm and less than 500 nm. |
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