Navegando por Autor "Moura, Thiago R. S."
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Artigo Controlling the core-to-core distance of vortex pairs in exchange-biased iron elliptical nanoelements(AIP Publishing LLC, 2012-02-10) Carriço, Artur da Silva; Oliveira, Felipe F.; Moura, Thiago R. S.; Dantas, Ana L.; Rebouças, G. O. G.We report a theoretical study of vortex pairs in exchange-biased elliptical iron nanoelements. We show that the remanent state may be tailored to fit vortex pairs with opposite chiralities separated by a diamond-like domain. Flat nanoelements with lateral dimensions ranging from 115 nm × 425 nm to 195 nm × 425 nm have the core-to-core distance tunable by the interface field strength.Artigo Tailoring the vortex core in confined magnetic nanostructures(AIP Publishing LLC, 2012-03-02) Carriço, Artur da Silva; Moura, Thiago R. S.; Oliveira, Felipe F.; Dantas, Ana L.; Rebouças, G. O. F.We present a study of vortex formation in interface biased nano-sized disk and square nanoelements of Fe and PyTM. For small lateral dimensions, the circular nanoelements have smaller vortex core diameter than square nanoelements with equal top surface area. For surface area ranging from 1900 nm2 to 6700 nm2, the vortex core diameter of 30 nm thick Fe (PyTM) nanoelements varies from 32 nm (36 nm) to 36 nm (48 nm). Interface effects are stronger for PyTM nanoelements.