Topological defects, pattern evolution, and hysteresis in thin magnetic films
P. A. Prudkovskii, A. N. Rubtsov, M. I. Katsnelson
Abstract
Nature of the magnetic hysteresis for thin films is studied by the Monte-Carlo simulations. It is shown that a reconstruction of the magnetization pattern with external field occurs via the creation of vortex-antivortex pairs of a special kind at the boundaries of stripe domains. It is demonstrated that the symmetry of order parameter is of primary importance for this problem, in particular, the in-plane magnetic anisotropy is necessary for the hysteresis.
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