Navegando por Autor "Silva, A. S. M."
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Artigo Nucleation of vortex pairs in exchange biased nanoelements(American Institute of Physics, 2011-03-24) Carriço, Artur da Silva; Rebouças, G. O. G.; Dantas, Ana L.; Silva, A. S. M.We report a theoretical investigation of interface effects in the magnetic order of interface biased iron and Permalloy™ elliptical nano-elements. Contrary to intuition, there is a partial pinning of the interface layer, favoring double vortex states along the hysteresis loop. Interface biasing affects the relative chirality and the distance of the vortices. Unbiased nanoelements may nucleate vortex pairs with the same chirality separated by an antivortex. For interface biased nanoelements the vortex pair forms with opposite chirality separated by a magnetic domain.