期刊
SIAM JOURNAL ON MATHEMATICAL ANALYSIS
卷 42, 期 1, 页码 519-537出版社
SIAM PUBLICATIONS
DOI: 10.1137/090762646
关键词
micromagnetics; Landau-Lifshitz equations; dissipative wave maps
资金
- Engineering and Physical Sciences Research Council [EP/E035027/1] Funding Source: researchfish
- EPSRC [EP/E035027/1] Funding Source: UKRI
We derive a damped wave-type limit for the Landau-Lifshitz-Gilbert equation in thin films starting from the full micromagnetic model. The result, previously encountered in [A. Capella, C. Melcher, and F. Otto, Nonlinearity, 20 (2007), pp. 2519 2537] in the context of reduced models for domain wall motion, applies in situations with topological singularities near the boundary. We also establish improved continuity properties for the limit equation and a relation between the kinetic energy in terms of the stray-field energy defect.
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