Kaur, Jasneet and Gupta, Vinay and Kotnala, R. K. and Verma, Kuldeep Chand (2012) Size dependent dielectric properties of Co and Fe doped SnO2 nanoparticles and their nanorods by Ce co-doping. Indian Journal of Pure and Applied Physics, 50 (1). pp. 57-63. ISSN 0019-5596

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Abstract

tructural, microstructural and dielectric properties of transition metal doped, i.e., Co and Fe (0, 1, 3 and 5 mol% each) SnO2 and the formation of their :nanorods by Ce (4 mol%) co-doping have been studied. These natioparticles and nanorods were fabricated by a chemical route using polyvinyl alcohol as surfactant. The X-ray diffraction patterns show that all the specimens have tetragonal rutile structure without any extra phase. The transmission electron microscopy analysis shows that the average particle size lies in the range 11-30 nm and the diameter of rods in the range 5-20 nm and length 50-200 nm. It is observed that by co-doping of Ce3+, the resulting nanoparticles assembled themselves into rod like structures. The nature and concentration of dopants are found to play crucial role in tuning the morphology and electrical properties of nanostructures. The dielectric behaviour of Co and Fe doped and Ce co-doped SnO2 nanostructures has been analyzed and it is observed that the value of dielectric constant (epsilon(r)) decreases rapidly in lower frequency regime, whereas it depicts a slight dispersion in the middle and higher frequency range and resonant behaviour in sufficiently higher frequency region. The frequency dependent ac conductivity shows higher resistivity of nanoparticles and explains the dispersion in dielectric behaviour.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s NISCAIR
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 11:01
Last Modified:	19 Aug 2026 11:01
URI:	https://npl.csircentral.net/id/eprint/3428

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