| 简介 |
In one embodiment, a permanent magnet has a composition represented by a composition formula : RpFeqMrCusCo100-p-q-r-s, where R is a rare earth element, M is at least one element selected from Zr, Ti, and Hf, p is 8.0 atomic% or more and 13.5 atomic% or less, q is 25 atomic% or more and 40 atomic% or less, r is 0.88 atomic% or more and 7.2 atomic% or less, and s is 3.5 atomic% or more and 13.5 atomic% or less, and a metallic structure including a cell phase having a Th2Zn17 crystal phase, a cell wall phase, and a platelet phase existing along a c plane of the Th2Zn17 crystal phase. An average thickness of the platelet phase is in a range of from 2.5 nm to 20 nm. |
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