High-field ESR measurements of CoS2

ESR measurements for a single crystal of CoS2 have been performed using a v ector network analyzer in the frequency region from 45 to 110 GHz and in ma gnetic fields up to 5 T. The measuring temperature is varied from 10 to 200 K covering ferro- and paramagnetic states. In the ferromagnetic state, the line width increases with increasing frequency and with decreasing tempera ture. On the other hand, the line width in the paramagnetic state is indepe ndent of frequency and increases proportionally with increasing temperature . (C) 2001 Elsevier Science B.V. All rights reserved.