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
Publication Date (Web): Jul 22, 2012
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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.
Ceramics, electrical properties, dielectrics, XRD.