Abstract
Measurements of the initial permeability of a commercial square-loop ferrite (Ferroxcube D.1) as a function of frequency and temperature are reported. These show the presence of a relaxation, which is due to the damping of domain boundary walls in the material by a process of electron diffusion. It is found that all the domain walls in the material are not affected by this process. The presence of the relaxation does not allow the dynamic characteristics of the domain walls, important in conventional pulsed-reversal experiments; to be determined by the method employed here.
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