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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|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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