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Type: Artigo de periódico
Title: Nanostructure And Giant Hall Effect In Tmx(sio2) 1-x (tm=co,fe,ni) Granular System
Author: Socolovsky L.M.
Oliveira C.L.P.
Denardin J.C.
Knobel M.
Torriani I.L.
Abstract: Granular TMx (Si O2) 1-x (TM=Co,Fe,Ni) thin films were thermally treated at different temperatures and their magnetotransport and structural properties were studied. Hall resistivity decreases with thermal annealing. Structure was analyzed based on small angle x-ray scattering results. A model of polydisperse system of hard spheres was used for obtaining structural parameters. Analysis reveals that a volume fraction of transition-metal atoms (less than 29%) are forming nanospheres. Changes in giant Hall effect upon annealing can depend on a particular combination of nanoparticle diameter, interparticle distance, and size distribution. © 2006 American Institute of Physics.
Rights: aberto
Identifier DOI: 10.1063/1.2171013
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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