| 简介 |
In one embodiment, a permanent magnet has a composition expressed by a composition formula : RNx(CrpSiqM1-p-q)z (R is at least one element selected from Y and rare-earth elements, M is at least one element selected from Fe and Co, and x, p, q, and z are atomic ratios satisfying 0.5≤x ≤ 2.0, 0.005 ≤p ≤ 0.2, 0.005 ≤q ≤0.2, and 4 ≤ z ≤ 13, respectively). The permanent magnet has a density of 6.5 g/cm3 or more and satisfies the relationship of I(110)/{I(110) +I(303)} ≤ 0.05, in which I(303) represents a diffraction peak intensity from a (303) plane of a Th2Zn17 phase obtained through powder X-ray diffraction of the permanent magnet, and I(110) represents a diffraction peak intensity from a (110) plane of an α-Fe phase obtained through the powder X-ray diffraction. |
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