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Energetics and switching of quasi-uniform states in small ferromagnetic particles

TitleEnergetics and switching of quasi-uniform states in small ferromagnetic particles
Publication TypeJournal Article
Year of Publication2004
AuthorsAlouges, F, Conti, S, DeSimone, A, Pokern, I
JournalM2AN Math. Model. Numer. Anal. 38 (2004) 235-248
Abstract

We present a numerical algorithm to solve the micromagnetic equations based on tangential-plane minimization for the magnetization update and a homothethic-layer decomposition of outer space for the computation of the demagnetization field. As a first application, detailed results on the flower-vortex transition in the cube of Micromagnetic Standard Problem number 3 are obtained, which confirm, with a different method, those already present in the literature, and validate our method and code. We then turn to switching of small cubic or almost-cubic particles, in the single-domain limit. Our data show systematic deviations from the Stoner-Wohlfarth model due to the non-ellipsoidal shape of the particle, and in particular a non-monotone dependence on the particle size.

URLhttp://hdl.handle.net/1963/2999
DOI10.1051/m2an:2004011

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