表 3. The critical radius of 4 kinds of magnetic medium.
4 种磁介质的临界半径
| 磁介质种类 | Re/nm |
| Fe3O4 | 10.63 |
| FeCo | 20.4 |
| fccFePt | 3.37 |
| L10FePt | 0.928 |
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