A domain size effect in the magnetic hysteresis of NiZn-ferrites

Abstract

The domain size and the ac-hysteresis of NiZn-ferrites have been investigated as a function of grain size. It is found that the ac-hysteresis or energy dissipation at MHz frequencies is substantially reduced in fine-grained, monodomain NiZn-ferrites, which is attributed to the absence of intragranular domain walls.