Periodic instantons and domain structure in a ferromagnetic film

G.-P. Zheng (), J.-Q. Liang, Y.-H. Nie and Wesley Yin

The European Physical Journal B: Condensed Matter and Complex Systems, 2003, vol. 36, issue 2, 215-220

Abstract: We in this paper study periodic instantons and domain structures in a theoretical film consisting of biaxial-anisotropic ferromagnets. In a proper approximation the equation of motion of the magnetization vector as a space-time function in the film is reduced to the 1 + 2-dimensional sine-Gordon field equation in strong anisotropy limit. Static periodic instantons, which are solutions of Euclidean field equantion, and various new domain structures are obtained analytically. We also investigate the energy density and stability of the periodic instantons. Copyright Springer-Verlag Berlin/Heidelberg 2003

Date: 2003
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DOI: 10.1140/epjb/e2003-00338-5

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