| Автор | J Labrujere |
| Автор | T O Klaassen |
| Автор | N J Poulis |
| Дата выпуска | 1982-02-20 |
| dc.description | In this paper experimental results on electron spin dynamics in a 3D Heisenberg ferromagnet are presented. These experimental results, the spectral densities phi <sub>0</sub><sup>+</sup>( omega ), phi <sub>0</sub><sup>z</sup>( omega ) and phi <sub>01</sub><sup>+</sup>( omega ) of the spin auto- and pair correlation functions, have been measured in Rb<sub>2</sub>CuBr<sub>4</sub>.2H<sub>2</sub>O at relatively high temperatures (T=20K, 77K, so that kT>>JS<sup>2</sup>+g mu <sub>B</sub>B). Comparison of these results with some current theoretical models on spin correlations shows a good high-frequency/short-time agreement. The low-frequency part/diffusion region, shows a remarkable discrepancy, which can be explained by a too high theoretical diffusion constant. The authors' experimental diffusion constant is determined to be D<sub>exp</sub>=0.31+or-0.03 J<sub>1</sub>a<sup>2</sup>/h(cross). |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Spin dynamics in a 3D Heisenberg ferromagnet in the paramagnetic state II |
| Тип | paper |
| DOI | 10.1088/0022-3719/15/5/018 |
| Print ISSN | 0022-3719 |
| Журнал | Journal of Physics C: Solid State Physics |
| Том | 15 |
| Первая страница | 999 |
| Последняя страница | 1014 |
| Аффилиация | J Labrujere; Kamerlingh Onnes Lab., Rijksuniv. Leiden, Leiden, Netherlands |
| Аффилиация | T O Klaassen; Kamerlingh Onnes Lab., Rijksuniv. Leiden, Leiden, Netherlands |
| Аффилиация | N J Poulis; Kamerlingh Onnes Lab., Rijksuniv. Leiden, Leiden, Netherlands |
| Выпуск | 5 |
