RARE-EARTH SINTERED MAGNET AND RARE-EARTH SINTERED MAGNET SINTERED BODY FOR USE WITH SAME, AND MAGN

文件类型：PDF文档
文件大小：3371K
Provided is a rare-earth sintered magnet and the like with which a magnetic flux having a practically useful surface magnetic flux density can be generated only in one surface in a thickness direction, without increasing the size or weight of a magnet unit. The rare-earth sintered magnet has a configuration in which a number of magnet material particles including a rare-earth substance and each having an axis of easy magnetization have been integrally sintered. The rare-earth sintered magnet is provided with a first surface and a second surface opposing each other in the thickness direction. In a plane parallel with a width direction and the thickness direction, the magnet material particles are magnetized such that, in a region extending from each of both ends in the width direction toward the center in the width direction, the orientation direction of the axis of easy magnetization is gradually changed. A maximum surface magnetic flux density in the first surface and a maximum surface magnetic flux density in the second surface satisfy the relationship (D1/D2) ≥ 4. The orientation direction of the axis of easy magnetization may vary between each of both ends in the width direction and the center in the width direction by 90°±5° or 180°±5°.