PERMANENT MAGNET, AND MOTOR AND POWER GENERATOR INCLUDING THE SAME

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PROBLEM TO BE SOLVED : To provide a permanent magnet capable of exhibiting large coercive force with good reproducibility while using a Sm-Co based magnet having a composition of high Fe concentration. SOLUTION : The permanent magnet of an embodiment has a composition represented by a compositional formula : RpFeqMrCusCo100-p-q-r-s (where, R represents a rare earth element, M represents at least one element selected from among Zr, Ti and Hf, and 10≤p≤13.5, 28≤q≤40, 0.88≤r≤7.2 and 3.5≤s≤13.5 (at%) are satisfied), and includes a metallographic structure including a cell phase having a Th2Zn17 crystal phase and a cell wall phase. An Fe concentration (C1) in the cell phase is in the range from 28 at% or more to 45 at% or less, and a difference (C1-C2) between the Fe concentration (C1) in the cell phase and an Fe concentration (C2) in the cell wall phase exceeds 10 at%. COPYRIGHT : (C)2013, JPO&INPIT