Coercive Force of Iron Resulting from the Interaction of Domain Boundaries with Large Nonmagnetic Inclusions

Abstract
The interaction of large inclusions with slowly moving domain boundaries has been quantitatively examined and the contribution made by such inclusions to the coercive force predicted. Several physical models of the interaction between large inclusions and moving Bloch walls were investigated by making calculations of the energy of the closure domain configuration about the inclusions for various positions of the moving domain boundary. By statistically treating a random distribution of inclusions, the coercive force was calculated as a function of the inclusion distribution parameters. Several features of the interactions between spike-shaped closure domains and moving domain boundaries have been elucidated.

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