Low temperature FMR linewidth in reentrant magnets

摘要

The FMR linewidth is studied experimentally for reentrant magnets (Fe/sub x/Ni/sub 100-x/)/sub 77/B/sub 13/Si/sub 10/ in the temperature interval 0.3 K>T>200 K, for frequencies 68 GHz>/spl planckspl omegakT>78 GHz. The low temperature, interval down to T/spl ap/0.3 K is thoroughly explored. The linewidth behavior agrees qualitatively with the theoretical model.