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Issue ESAIM: Proc.
Volume 22, 2008
CANUM 2006 - Congrès National d'Analyse Numérique
Page(s) 127 - 131
DOI http://dx.doi.org/10.1051/proc:072215
Published online 01 February 2008

ESAIM: Proc., 2008, Vol. 22, pp. 127-131
DOI: 10.1051/proc:072215

3D dynamic micromagnetic simulations of susceptibility spectra in soft ferromagnetic particles

Fabrice Boust1, Nicolas Vukadinovic2 and Stéphane Labbé3

1  Onera, 29 Avenue de la Division Leclerc, 92320 Châtillon, France
2  Dassault Aviation, 78 quai Marcel Dassault, 92552 St-Cloud, France
3  Laboratoire de Mathématiques, Bât. 425, Université Paris 11, 91405 Orsay Cedex, France


(Published online: 1 February 2008)

Abstract
The high-frequency properties of small 3D ferromagnetic elements are investigated by means of micromagnetic simulations. The dynamic susceptibilty spectra associated with two types of submicrometer-size elements: a cylindrical dot with a vortex state and an eye shape particle with a bidomain state are reported. In these confined structures, the spectra reveal a rich variety of modes which are identified.


Résumé
Les propriétés hautes fréquences de petits éléments ferromagnétiques 3D ont été étudiées à l'aide de simulations micromagnétiques. Les spectres de susceptibilité dynamique associés à deux types d'éléments de taille submicrométrique : un plot cylindrique présentant un état vortex et une particule en forme d'oeil présentant un état bidomaine sont reportés. Dans ces structures confinées, les spectres révèlent une riche variété de modes qui sont identifiés.


Mathematics Subject Classification. 35Q60, 65Z05

Key words: Micromagnetism, Dynamic susceptibility


© EDP Sciences, ESAIM 2007


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