RARE-EARTH COBALT PERMANENT MAGNET, MANUFACTURING METHOD THEREFOR, AND DEVICE

A rare-earth cobalt permanent magnet having excellent magnetic characteristics, a method for manufacturing such rare-earth cobalt permanent magnet, and a device including such rare-earth cobalt permanent magnet are provided. The rare-earth cobalt permanent magnet consists of 23 to 27 mass % of a rare-earth element R including Sm, 4.0 to 5.0 mass % of Cu, 22 to 27 mass % of Fe, 1.7 to 2.5 mass % of Zr, and a remainder consisting of Co and unavoidable impurities, wherein the rare-earth cobalt permanent magnet includes a plurality of crystal grains and grain boundary parts, and the size of a cell structure constituting the crystal grain is 100 to 600 nm. 提供了具有优异的磁特性的稀土钴永磁体，用于制造这种稀土钴永磁体的方法以及包括这种稀土钴永磁体的装置。稀土钴永磁体由以下成分组成：23至27质量％的包括Sm的稀土元素R、4.0至5.0质量％的Cu、22至27质量％的Fe、1.7至2.5质量％的Zr和作为余量的Co以及不可避免的杂质，其中稀土钴永磁体包含多个晶粒和晶界部分，并且构成晶粒的晶胞结构的尺寸为100nm至600nm。