Table of Contents
Journal of Nanoscience
Volume 2014 (2014), Article ID 862415, 10 pages
http://dx.doi.org/10.1155/2014/862415
Research Article

FTIR and Electrical Study of Dysprosium Doped Cobalt Ferrite Nanoparticles

1Department of Physics, G. B. Pant University of Ag. & Technology, Pantnagar, Uttarakhand-263145, India
2Department of Applied Science, Krishna Engineering College, Mohan Nagar, Ghaziabad, Uttar Pradesh-201007, India
3Inter University Accelerator Centre, New Delhi 110067, India

Received 9 January 2014; Revised 7 April 2014; Accepted 7 April 2014; Published 18 May 2014

Academic Editor: Tian Xia

Copyright © 2014 Hemaunt Kumar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have studied the role of Dy3+ doping on the XRD, TEM, FTIR, and dielectric and electrical properties of CoFe2O4 at room temperature. Cubic spinel phase of CoFe2−xDyxO4 ( = 0.00, 0.05, 0.10, and 0.15) was synthesized by using different sintering temperatures (300, 500, 700, and 900°C). The two absorption bands ν1 and ν2 are observed in Fourier transform infrared spectroscopy (FTIR) spectra corresponding to the tetrahedral and octahedral sites, which show signature of spinel structure of the sample. For the sample sintered at 300°C, the dielectric constant is almost unchanged with the frequency at the particular concentrations of = 0.00 and 0.05. Similar result is obtained for the sample sintered at 500°C ( = 0.10, 0.15), 700°C ( = 0.05, 0.10, and 0.15), and 900°C ( = 0.05, 0.10). An increase in the dielectric constant was observed for the undoped cobalt ferrite sintered at 500, 700, and 900°C. The values of electrical resistivity of the materials vary from ~105 to 109 Ω-cm.