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ISSN Print: 1543-1649
ISSN Online: 1940-4352
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Multiscale Finite Element Modelling of Pattern Formation in Magnetostrictive Composite Thin Film
ABSTRACT
A multiscale finite element model with subgrid-scale spatial homogenization and stability estimate for time discretization in the context of magnetostrictive composite thin-film micromagnetics are reported in this paper. Developments of the phenomenological microscopic constitutive model and the subsequent multiscale approach are aimed at analyzing the formation of magnetic domains in Terfenol-D/epoxy thin film under transverse magnetic (TM) mode of excitation. The phenomenological constitutive model is based on the density of domain switching (DDS) of an ellipsoidal inclusion in a unit cell. The subgrid-scale spatial homogenization works as a method of upwinding the small-scale micromagnetism and magnetostriction to the larger length scale. Numerical results indicate complex features of this thin-film dynamics, such as the formation of connected domains.
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Lu XiaoYan, Li Hui, Magnetic properties of Terfenol-D film on a compliant substrate, Journal of Magnetism and Magnetic Materials, 322, 15, 2010. Crossref