Table of Contents
Journal of Solid State Physics
Volume 2013, Article ID 451563, 9 pages
http://dx.doi.org/10.1155/2013/451563
Research Article

Dielectric Properties of Rhombohedral

1Physics Department, Egra SSB College, Egra, West Bengal 721429, India
2Kendriya Vihar C-4/60, V.I.P. Road, Kolkata 700052, India

Received 30 April 2013; Revised 26 August 2013; Accepted 20 September 2013

Academic Editor: Hamdy Doweidar

Copyright © 2013 Kriti Ranjan Sahu and Udayan De. 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

Dielectric materials are needed in many electrical and electronic applications. So, basic characterizations need to be done for all dielectrics. (PN) is ferroelectric and piezoelectric only in its orthorhombic phase, with potential high temperature applications. So, its rhombohedral phase, frequently formed as an undesirable impurity in the preparation of orthorhombic PN, has been ignored with respect to possible dielectric characterizations. Here, essentially single phase rhombohedral PN has been prepared, checking structure from XRD Rietveld Analysis, and the real and imaginary parts of permittivity measured in an Impedance Spectrometer (IS) up to ~ and over 20 Hz to 5.5 MHz range, for heating and some cooling runs. Variations, with temperature, of relaxation time constant ( ), AC and DC conductivity, bulk resistance, activation energy and capacitance have been explored from our IS data.