Structure of the Bloch Wall in Multilayers

Carlos J. García-Cervera


We present an analysis of the structure of Bloch walls in layered magnetic materials in the context of micromagnetics. We have obtained the $\Gamma$-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 N\'eel walls in multilayers is carried out. We illustrate all our findings by numerically minimizing the one-dimensional energy.

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Carlos Garcia Cervera