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Energetics and switching of quasi-uniform states in small ferromagnetic particles
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Alouges, François, Conti, Sergio, DeSimone, Antonio and Pokern, Yvo (2004) Energetics and switching of quasi-uniform states in small ferromagnetic particles. ESAIM: Mathematical Modelling and Numerical Analysis, Vol.38 (No.2). pp. 235-248. doi:10.1051/m2an:2004011 ISSN 0764-583X.
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Official URL: http://dx.doi.org/10.1051/m2an:2004011
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.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QA Mathematics Q Science > QC Physics |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | ||||
Library of Congress Subject Headings (LCSH): | Ferromagnetism -- Mathematical models, Finite element method | ||||
Journal or Publication Title: | ESAIM: Mathematical Modelling and Numerical Analysis | ||||
Publisher: | EDP Sciences | ||||
ISSN: | 0764-583X | ||||
Official Date: | 2004 | ||||
Dates: |
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Volume: | Vol.38 | ||||
Number: | No.2 | ||||
Page Range: | pp. 235-248 | ||||
DOI: | 10.1051/m2an:2004011 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Funder: | European Union (EU), Deutsche Forschungsgemeinschaft (DFG) | ||||
Grant number: | FMRX-CT98-0229 (EU) |
Data sourced from Thomson Reuters' Web of Knowledge
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