| Abstrakt: |
This work reports the tailoring of optical and magnetic properties in Sb-doped SnO2 nanoparticles (NPs), i.e., Sn1-xSbxO2(x = 0.0, 0.03, 0.06, 0.09) synthesized by gel-combustion technique. The structural properties of these nanoparticles are investigated by the X-ray diffraction (XRD) technique. Detailed structural analysis shows the crystallization of all these NPs in tetragonal rutile structure, as observed in pristine SnO2 without any trace of the secondary phase. Nevertheless, the incorporation of Sb dopant was found to increase the lattice constant systematically. Investigation of surface morphology by scanning electron microscopy and particle size by transmission electron microscopy also indicates a systematic increase in the grain size and particle size with Sb doping. Intriguingly, bandgap and room-temperature ferromagnetism (RTFM) are found to be sensitive to particle size and oxygen vacancies. UV–visible absorption, Fourier transform infrared, photoluminescence, and X-ray photoelectron spectroscopic measurements are carried out to explore the underlying physical mechanisms. Besides, the increase in RTFM and decrease in the bandgap witnessed in Sb-doped SnO2 NPs can be exploited for magneto-optic and spintronic devices. [ABSTRACT FROM AUTHOR] |
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