Loss Mechanisms in Spinel Ferrites

Abstract
New data on ferrimagnetic resonance linewidth at 9200 Mc/sec in a ferrite of composition (NiO)0.75 (FeO)0.25 Fe2 O3 are presented. These data are compared with earlier observations of ferrimagnetic resonance linewidth at 24 000 Mc/sec on the same material in order to distinguish between two theoretical analyses of the mechanism of loss involved.