Interface wall structure of exchange-coupled ferrimagnetic bilayer films for magneto-optical recording

Abstract

We investigated the static interface wall structure fur exchange-coupled double-layer magneto-optical films. Our calculation was based on the mean-field theory and the Landau-Lifshitz-Gilbert motion equation. We obtained the interface wall energy and switching fields in the magnetic hysteresis loops of bilayer films. The calculation shows that the interface magnetic wall structure depends on the magnetic properties of each layer, the external field, and also the thickness of the respective layer. These results have been confirmed by experiments.