| Автор | Hui-Qun Guo |
| Автор | K Zaveta |
| Автор | Bao-Gen Shen |
| Автор | Hong-Ying Yang |
| Автор | H Kronmuller |
| Дата выпуска | 1993-09-06 |
| dc.description | Magnetization measurements in the temperature range 1.5-300 K have been made on two series of samples of nanocrystalline ferromagnets: Fe<sub>60</sub>Co<sub>30</sub>Zr<sub>10</sub> and Fe<sub>73.5</sub>CuNb<sub>3</sub>Si<sub>13.5</sub>B<sub>9</sub>. It was found that at low temperatures magnetization decreases in accordance with the Heisenberg-model prediction for both series of samples. The coefficients B and C were obtained by fitting M<sub>s</sub>(T) to two terms, T<sup>3/2</sup> and T<sup>5/2</sup>, from the Bloch law. It is shown that for both series of samples the B and C coefficients are larger in the amorphous state than in the nanocrystalline state; larger values of spin-wave stiffness constants D were obtained in nanocrystalline FeCoZr samples with grain size d<40 nm than in the amorphous state; with increasing grain size a much larger value for D was observed for nanocrystalline FeCoZr with a grain size of 140 nm. The results present a reasonable agreement with predictions for nanocrystalline materials with two or three different magnetic phases. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Low-temperature magnetization and spin-wave excitation in nanocrystalline ferromagnets |
| Тип | lett |
| DOI | 10.1088/0953-8984/5/36/002 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 5 |
| Первая страница | L437 |
| Последняя страница | L442 |
| Аффилиация | Hui-Qun Guo; Inst. of Phys., Acad. of Sci., Beijing, China |
| Аффилиация | K Zaveta; Inst. of Phys., Acad. of Sci., Beijing, China |
| Аффилиация | Bao-Gen Shen; Inst. of Phys., Acad. of Sci., Beijing, China |
| Аффилиация | Hong-Ying Yang; Inst. of Phys., Acad. of Sci., Beijing, China |
| Аффилиация | H Kronmuller; Inst. of Phys., Acad. of Sci., Beijing, China |
| Выпуск | 36 |
