Magnetic ordering and domain-wall relaxation in zinc-ferrous ferrites

The magnetic data and permeability spectra of the ${\mathrm{Zn}}_x{\mathrm{Fe}}_{3-x}{\mathrm{O}}_4$ system have been obtained for $x=0, 0.2, 0.4, 0.6, \mathrm{and} 0.8$. The observations indicate existence of a Yafet-Kittel type of magnetic ordering in the mixed ferrites. The permeability spectra have been analyzed in terms of processes involving domain-wall translation and domain rotation. The analysis shows that the ratio of the resonance frequency to the relaxation frequency for domain translation decreases monotonically as the zinc concentration is increased.