Experimental study of the structural, microscopy and magnetic properties of Ni-doped SnO(2) nanoparticles

  • ARAGON, F. H.
  • COAQUIRA, J. A. H.
  • HIDALGO, P.
  • BRITO, S. L. M.
  • GOUVEA, D.
  • CASTRO, R. H. R.
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Publication date
January 2010
Publisher
ELSEVIER SCIENCE BV

Abstract

A polymer precursor method has been used to synthesize Ni-doped SnO(2) nanoparticles. X-ray diffraction (XRD) data analyses indicate the exclusive formation of nanosized particles with rutile-type phase (tetragonal SnO(2)) for Ni contents below 10 mol%. In this concentration range, the particle sizes decrease with increasing Ni content and a bulk solid solution limit was determined at similar to 1 mol%. Ni surface enrichment is present at concentrations higher than the solution limit. Only above 10 mol% Ni. the formation of a second NiO-related phase has been determined. Magnetization measurements suggest the occurrence of ferromagnetism for samples in the solid solution regime (below similar to 1 mol%). This ferromagnetism is associated wi...

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