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

François Alouges; Sergio Conti; Antonio DeSimone; Yvo Pokern

ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique (2004)

  • Volume: 38, Issue: 2, page 235-248
  • ISSN: 0764-583X

Abstract

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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.

How to cite

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Alouges, François, et al. "Energetics and switching of quasi-uniform states in small ferromagnetic particles." ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique 38.2 (2004): 235-248. <http://eudml.org/doc/245000>.

@article{Alouges2004,
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.},
author = {Alouges, François, Conti, Sergio, DeSimone, Antonio, Pokern, Yvo},
journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique},
keywords = {micromagnetics; finite elements; small ferromagnetic particles; micromagnetic equilibrium; flower-vortex transition; finite-element computations},
language = {eng},
number = {2},
pages = {235-248},
publisher = {EDP-Sciences},
title = {Energetics and switching of quasi-uniform states in small ferromagnetic particles},
url = {http://eudml.org/doc/245000},
volume = {38},
year = {2004},
}

TY - JOUR
AU - Alouges, François
AU - Conti, Sergio
AU - DeSimone, Antonio
AU - Pokern, Yvo
TI - Energetics and switching of quasi-uniform states in small ferromagnetic particles
JO - ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
PY - 2004
PB - EDP-Sciences
VL - 38
IS - 2
SP - 235
EP - 248
AB - 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.
LA - eng
KW - micromagnetics; finite elements; small ferromagnetic particles; micromagnetic equilibrium; flower-vortex transition; finite-element computations
UR - http://eudml.org/doc/245000
ER -

References

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