Table of Contents Author Guidelines Submit a Manuscript
Research Letters in Materials Science
Volume 2008, Article ID 746256, 5 pages
http://dx.doi.org/10.1155/2008/746256
Research Letter

Complex Impedance Spectroscopic Properties of B a 𝟑 V 𝟐 O 𝟖 Ceramics

Department of Physics and Meteorology, Indian Institute of Technology (IIT) Kharagpur, Kharagpur 721302, India

Received 27 November 2007; Accepted 18 February 2008

Academic Editor: Stephen Danforth

Copyright © 2008 Praveen Khatri 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

The polycrystalline sample of B a 3 V 2 O 8 was prepared by a high-temperature solid-state reaction technique. The effect of temperature on impedance parameters was studied using an impedance analyzer in a wide frequency range ( 1 0 2 - 1 0 6  Hz). The real and imaginary parts of complex impedance trace semicircles in the complex plane. The temperature-dependent plots reveal the presence of both bulk and grain boundary effects above 1 2 5 ∘ C. The bulk resistance of the material decreases with rise in temperature. This exhibits a typical negative temperature coefficient of resistance (NTCR) behavior of the material. The modulus analysis suggests a possible hopping mechanism for electrical transport processes of the material. The nature of variation of dc conductivity suggests the Arrhenius type of electrical conductivity.