| 申请日期 | 2025-06-25 | 申请号 | US16008147 |
| 公开（公告）号 | US11244701B2 | 公开（公告）日 | 2022-02-08 |
| 公开国别 | US | 申请人省市代码 | 全国 |
| 申请人 | FUJIFILM Corporation | ||
| 简介 | Provided is hexagonal strontium ferrite powder for magnetic recording, in which an activation volume is 800 to 1, 500 nm3, a content of rare earth atom with respect to 100 atom % of iron atom is 0.5 to 5.0 atom %, and a rare earth atom surface portion uneven distribution is provided. | ||
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