<正> Nd_(15)Fe_(77)B_8是新型优异永磁材料,它的弱点是Curie点Tc太低,仅约310℃,因而永磁性的温度系数较大。掺Co可提高Tc,是改善材料磁性温度稳定性的一个途径。
Hyperfine parameters of Fe sublattices in Nd_2Fe_(14)B have been deduced by refering to the magnetic moment values of Fe for different sites obtained by Givord et al using polarized neutron diffraction technique. By examining the ~(57)Fe Mǒssbauer spectra of Co doped specimen, it is observed that Co atoms, while their amount is small, preferentially enter k_2 site of Fe and thus creat unequivalent sites of their nearest neighbors, e. g. k_1 and j_2 Fesites. And they will enter other Fe-site if more Co was doped.
参考文献
| [1] | |
| [2] | |
| [3] |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%