Dynamic topological solitons in a two-dimensional ferromagnet |
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Authors: | A. A. Zhmudskii B. A. Ivanov |
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Affiliation: | (1) Institute of Magnetism, Ukrainian National Academy of Sciences, 252680 Kiev, Ukraine |
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Abstract: | It is shown that stable, skyrmion-type, dynamic solitons can be constructed for a wide class of two-dimensional models of anisotropic ferromagnets. These solitons are stabilized as a result of the conservation of various integrals of motion: the z projection of the total spin S z or the orbital angular momentum L z of the magnetization field. A class of two-parameter solitons with quite complicated (almost periodic) magnetization-field dynamics exists for a purely uniaxial model (in the sense of both spin and spatial rotations) with maximum symmetry. Stable solitons with periodic magnetization dynamics exist for ferromagnets with lower symmetry (only S z or L z or the total angular momentum J z =L z +S z is conserved). Zh. éksp. Teor. Fiz. 115, 1511–1530 (April 1999) |
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