Another approach to the thin-film Gamma-limit of the micromagnetic free energy in the regime of small samples

Details Another approach to the thin-film Gamma-limit of the micromagnetic free energy in the regime of small samples Another approach to the thin-film Gamma-limit of the micromagnetic free energy in the regime of small samples

2011-05-21

arxiv.org/abs/1105.4266v2

Mathematics

Analysis of PDEs

14 pages

Scientific paper

The asymptotic behavior of the micromagnetic free energy governing a ferromagnetic film is studied as its thickness gets smaller and smaller compared to its cross section. Here the static Maxwell equations are treated as a Murat's constant-rank PDE constraint on the energy functional. In contrast to previous work this approach allows to keep track of the induced magnetic field without solving the magnetostatic equations. In particular, the mathematical results of Gioia and James [Proc. R. Soc. Lond. A 453 (1997), pp. 213-223] regarding convergence of minimizers are recovered by giving a characterization of the corresponding Gamma-limit.

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