Abstract
Sn1−xFexO2 (x = 0.00, 0.1, 0.12, 0.16 and 0.18) nanoparticles have been synthesized by ball milling. Analyses of the Raman spectra exhibit a strong correlation between the internal structure of the nanoparticles and their electrical and magnetic properties. The blue shift in the peak position of the symmetric A1g (630 cm−1) mode as well as appearance of new two Eu modes (255 and 324 cm−1) with Fe doping indicate to a formation of bridge oxygen vacancies in the nanoparticles which has been explained by Kröger–Vink notation. Oxygen vacancies make as trapping centers of the free electrons leading to an increase in the electrical resistivity. Fe doping induces another new peak at 540 cm−1 assigned to vibrations related to the Fe2+ ions accompanied by oxygen vacancies. The strength of this Raman peak increases with increasing the concentration of Fe in a good correlation with the behavior of the magnetization of the nanoparticles.
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