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Experimental study of the structural, microscopy and magnetic properties of Ni-doped SnO2 nanoparticles
- Source :
-
Journal of Non-Crystalline Solids . Dec2010, Vol. 356 Issue 52-54, p2960-2964. 5p. - Publication Year :
- 2010
-
Abstract
- Abstract: A polymer precursor method has been used to synthesize Ni-doped SnO2 nanoparticles. X-ray diffraction (XRD) data analyses indicate the exclusive formation of nanosized particles with rutile-type phase (tetragonal SnO2) for Ni contents below 10mol%. In this concentration range, the particle sizes decrease with increasing Ni content and a bulk solid solution limit was determined at ~1mol%. Ni surface enrichment is present at concentrations higher than the solution limit. Only above 10mol% 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 ~1mol%). This ferromagnetism is associated with the exchange interaction between electron spins trapped on oxygen vacancies, and is enhanced as the amount of Ni2+ substituting at Sn4+ sites increases. Above the solid solution limit, ferromagnetism is destroyed by the Ni surface enrichment and the system behaves as a paramagnet. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00223093
- Volume :
- 356
- Issue :
- 52-54
- Database :
- Academic Search Index
- Journal :
- Journal of Non-Crystalline Solids
- Publication Type :
- Academic Journal
- Accession number :
- 55526007
- Full Text :
- https://doi.org/10.1016/j.jnoncrysol.2010.06.081