Structural And Electrical Properties Of Ba3Sr2GdTi3V7O30 

^aDepartment of Physics, Betnoti College Betnoti, Mayurbhanj, Orissa, India

^bDepartment of physics, RGU-IIIT, Nuazvada, Krishna, Andhra Pradesh, India

^cDepartment of Physics, ITER, Bhubaneswar Odisha, India

Adv. Mater. Lett., 2012, Current Issue, 3 (4), pp 305-308

DOI: 10.5185/amlett.2011.11317

Publication Date (Web): Jul 22, 2012

Copyright © IAAM-VBRI Press

E-mail: ps_rilly@yahoo.com

Abstract

The polycrystalline Ba₃Sr₂GdTi₃V₇O₃₀ material of tungsten bronze structural family was prepared by a high-temperature solid-state reaction technique. Preliminary X-ray diffraction analysis exhibits the formation of single-phase compound with orthorhombic crystal system. Surface micrograph recorded by scanning electron microscopic (SEM) technique has well defined but non-uniformly distributed grains throughout the surface of the pellet sample. Detailed studies of dielectric properties as a function of temperature (306-773 K) and frequencies (10²-10⁶Hz) suggest that the compound has frequency independent diffused dielectric anomaly at a temperature ~620 K which may be related to ferroelectric phase transition which is confirmed from polarization study. The frequency and temperature dependence of impedance property of the material were analyzed using a complex impedance spectroscopy. The Nyquist plots confirmed the presence of grain and grain boundary effect in the material.

Keywords

Ceramics, electrical properties, dielectrics, XRD.