NDLI: Structural, electronic and magnetic properties of Sn0.95Ni0.05O2 nanorods

Content Provider	Royal Society of Chemistry (RSC)
Author	Rao, S. Manjunath Reddy, P. Venugopal Srinivas, K.
Copyright Year	2011
Abstract	With a view to investigate the structural, electronic and magnetic properties of Ni (5%) doped SnO2 diluted magnetic semiconductor nanorods prepared by a PEG-6000 assisted wet chemical route, a systematic investigation has been carried out. The micro structural properties were investigated by Rietveld refinement of XRD data, AFM, TEM, EDS, SAED, FTIR, Raman scattering and XPS measurements. These studies revealed that Sn0.95Ni0.05O2 nanorods have a polycrystalline single phase tetragonal rutile structure without any detectable impurity phases and the aspect ratios of the nanorods are in the range 2.85–10.2. The deconvoluted XPS core level Ni 2p spectral studies determined the oxidation state of Ni as +2. The nanosize effects and local defects are found to influence the local electronic structure of materials. From M–H, M–T, m agnetic force microscopy (MFM) and ESR studies, all the samples are found to exhibit clear room temperature ferromagnetism without any metallic clusters. The magnetization behaviour is found to depend on the overlap of percolated bound magnetic polarons and their interactions with dopant induced defects. The magnetic exchange interactions are found to depend on the aggregation behaviour of nanorods, exchange media, the surface diffusion behaviour of randomly distributed Ni ions and the modification of electronic structure.
Starting Page	642
Ending Page	653
Page Count	12
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	3
Issue Number	2
Journal	Nanoscale
DOI	10.1039/c0nr00597e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Semiconductor Rietveld refinement ESR Tetragonal crystal system Crystallite Surface diffusion Rietveld X-ray crystallography Transmission electron microscopy Microscopy Raman scattering Dopant Raman Magnetic force microscope Ferromagnetism Titanium dioxide
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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