Uniform and localized magnetic modes in the random mixture with competing spin anisotropies,Fe(1−x)CoxBr2 |
| |
| Authors: | J Tuchendler K Katsumata S Legrand |
| |
| Institution: | Laboratoire P.M.T.M., C.N.R.S., Université Paris Nord, Avenue J.B. Clément 93430 Villetaneuse, France;Research Institute of Applied Electricity, Hokkaido University, Sapporo 060, Japan;DPhG/SRM CEN Saclay BP2, 91190 Gif-sur-Yvette, France |
| |
| Abstract: | Electron spin resonance experiments at millimeter and submillimeter wavelengths have been performed on the randomly mixed antiferromagnet with competing spin anisotropies, Fe(1?x)CoxBr2. Two antiferromagnetic resonance (AFMR) modes and extra resonances have been observed in the Co-rich concentration region. From the analysis of the AFMR, the anisotropy in the mixtures is shown to become small with concentration. This is a clear evidence for the competition of the anisotropies in these alloys. The extra modes are qualitatively explained as arising from a localized excitation of an Fe2+ spin. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
