Open AccessImpedance Spectroscopy of Ba<sub>5</sub>GdTi<sub>3</sub>V<sub>7</sub>O<sub>30</sub>
Author(s) -
B. B. Mohanty,
P. S. Sahoo,
Mohapatra Prakash Kumar Sahoo,
R. N. P. Choudhary,
R. N. P. Choudhary,
R. N. P. Choudhary,
R. N. P. Choudhary
Publication year - 2012
Publication title -
journal of modern physics
Language(s) - English
Resource type - Journals
eISSN - 2153-120X
pISSN - 2153-1196
DOI - 10.4236/jmp.2012.35050
Subject(s) - materials science , orthorhombic crystal system , dielectric spectroscopy , analytical chemistry (journal) , grain boundary , arrhenius equation , electrical resistivity and conductivity , arrhenius plot , atmospheric temperature range , tungsten , temperature coefficient , conductivity , crystallite , activation energy , condensed matter physics , crystallography , chemistry , microstructure , thermodynamics , crystal structure , composite material , electrochemistry , physics , electrode , chromatography , quantum mechanics , metallurgy
The polycrystalline sample of Ba5GdTi3V7O30 , a member of tungsten bronze structural family, was prepared by a high¬temperature solid-state reaction technique. A preliminary X-ray diffraction analysis suggests the formation of single-phase compound with orthorhombic structure. The effect of temperature on impedance parameters was studied using an impedance analyzer in a wide frequency range (102- 106 Hz) at different temperatures. The real and imaginary part of complex impedance traces semicircle(s) in the complex plane. The temperature dependent plots reveal the presence of both bulk and grain boundary effects. 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 Arrhenius type of electrical conductivity