| 申请日期 | 2026-03-14 | 申请号 | JP2002241295 |
| 公开（公告）号 | JP4422953B2 | 公开（公告）日 | 2010-03-03 |
| 公开国别 | JP | 申请人省市代码 | 全国 |
| 申请人 | Hitachi Ltd5108 | ||
| 简介 | A permanent magnet comprises a hard magnetic material that contains at least a rare earth element and an anti-ferromagnetic material, wherein the hard magnetic material and the anti-ferromagnetic material are magnetically coupled. A volume ratio of the anti-ferromagnetic material is 20% or less, based on the permanent magnet. | ||
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