| Автор | C P Adams |
| Автор | T E Mason |
| Автор | E Fawcett |
| Автор | A Z Menshikov |
| Автор | C D Frost |
| Автор | J B Forsyth |
| Автор | T G Perring |
| Автор | T M Holden |
| Дата выпуска | 2000-10-02 |
| dc.description | Inelastic neutron scattering has been used to measure the high-energy, low-temperature magnetic excitations of the itinerant antiferromagnet FeGe<sub>2</sub>. The spin-wave excitations follow a Heisenberg dispersion with exchange constant along the c-axis SJ<sub>FM</sub> = 68±1 meV an order of magnitude higher than the basal-plane antiferromagnetic constant SJ<sub>AFM</sub> = -4.4±0.6 meV. The c-axis spin waves are highly damped, even at temperatures small compared to SJ<sub>FM</sub>. The damping is roughly quadratic in energy (as in the hydrodynamic model) up to ~250 meV, beyond which a continuum of excitations emerges. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | High-energy magnetic excitations and anomalous spin-wave damping in FeGe<sub>2</sub> |
| Тип | paper |
| DOI | 10.1088/0953-8984/12/39/311 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 12 |
| Первая страница | 8487 |
| Последняя страница | 8493 |
| Выпуск | 39 |
