Structure of the Bloch wall in multilayers

Source abstract

We present an analysis of the structure of Bloch walls in layered magnetic materials in the context of micromagnetics. We have obtained the Γ -limit of a one-dimensional reduction of the Landau–Lifshitz energy for a double layer in several asymptotic regimes. As a result, the optimal energy, the core length and the optimal shape of the Bloch wall have been determined. The effects of the interlayer spacing and the film thickness are studied. A comparison between the structure of the Bloch and Néel walls in multilayers is carried out. We illustrate all our findings by numerically minimizing the one-dimensional energy.