Dielectric relaxation, phase transition and Rietveld studies of perovskite Pb0.94Sr0.06](Mn1/3Sb2/3)(0.05)(Zr0.52Ti0.48)(0.95)]O-3 ceramics

Brajesh, Kumar and Kumar, Pritam and Himanshu, AK and Ranjan, Rajeev and Bandyopadhayay, SK and Sinha, TP and Singh, NK (2014) Dielectric relaxation, phase transition and Rietveld studies of perovskite Pb0.94Sr0.06](Mn1/3Sb2/3)(0.05)(Zr0.52Ti0.48)(0.95)]O-3 ceramics. In: JOURNAL OF ALLOYS AND COMPOUNDS, 589 . pp. 443-447.

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Abstract

The frequency-dependent dielectric relaxation of Pb0.94Sr0.06](Mn1/3Sb2/3)(0.05)(Zr0.52Ti0.48)(0.95)]O-3 ceramics, synthesized in pure perovskite phase by a solid-state reaction technique is investigated in the temperature range from 303 to 773 K by alternating-current impedance spectroscopy. Using Cole-Cole model, an analysis of the imaginary part of the dielectric permittivity with frequency is performed assuming a distribution of relaxation times. The scaling behavior of the imaginary part of the electric modulus suggests that the relaxation describes the same mechanism at various temperatures. The variation of dielectric constant with temperature is explained considering the space-charge polarization. The SEM indicates that the sample has single phase with an average grain size similar to 14.2 mu m. The material exhibits tetragonal structure. A detailed temperature dependent dielectric study at various frequencies has also been performed. (C) 2013 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF ALLOYS AND COMPOUNDS
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	Copyright for this article belongs to then ELSEVIER SCIENCE SASWITZERLAND
Keywords:	Ceramics; Chemical synthesis; Impedance spectroscopy; Rietveld analysis; Dielectric properties
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	25 Feb 2014 08:29
Last Modified:	25 Feb 2014 08:31
URI:	http://eprints.iisc.ac.in/id/eprint/48456

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