Role of Cr3+ Substitution on Electrical and Dielectric Behavior of Cu-ferrite Nanoparticles
S. D. More1, C. M. Kale2, A.B.Shinde3, K. M. Jadhav4
1S. D. More, P.G. and Research Centre, Deogiri College, Aurangabad, India.
2C. M. Kale, Indraraj Arts, Commerce and Science College Sillod, Aurangabad, India.
3A.B.Shinde, P.G. and Research Centre, Department of Physics, Abasaheb Garware College, Pune, India.
4K. M. Jadhav, Dept of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, (M.S.) India.
Manuscript received on November 28, 2013. | Revised Manuscript received on December 12, 2013. | Manuscript published on December 30, 2013. | PP: 177-180 | Volume-3, Issue-2, December 2013. | Retrieval Number:  B2402123213/2013©BEIESP

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Abstract: Chromium substituted copper ferrite nano particles with generic formula CuCrxFe2-xO4 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) have been synthesized successfully in nano-crystalline form by wet chemical co-precipitation method. The as prepared powder of CuFe2-xCrxO4 was sintered at 800 0C for 12 h. X-ray diffraction (XRD) technique was employed to investigate the structural properties and to check the phase purity of the prepared samples. The analysis of XRD patterns revealed the formation of single phase cubic spinel structure for all samples. The average crystallite size of all samples was estimated using Scherrer’s formula and it is in the order of 30-40 nm. The lattice parameter obtained by using XRD data decreases with chromium substitution. The temperature dependence of d. c. electrical resistivity of all samples was studied by using two probe methods. The resistivity increases with increase in chromium substitution and as temperature increases resistivity decreases. The dielectric properties were investigated as a function of frequency at room temperature using LCR-Q meter. The dielectric constant (’), dielectric loss (”) and dielectric loss tangent (tanδ) decreases with increase in frequency.
Keywords: Resistivity, Spinel ferrite, Nano-crystalline, X-ray diffraction.