Modulus Spectroscopy and Dielectric Dispersion Studies in Alkali Metal Perchlorates

Shripathi, T and Bhat, HL and Narayanan, PS (1991) Modulus Spectroscopy and Dielectric Dispersion Studies in Alkali Metal Perchlorates. In: Physica Status Solidi A, 126 (2). pp. 511-519.

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Abstract

Alkali metal perchlorates (KClO4, RbClO4, and CsClO4) undergo a structural phase transition from the orthorhombic to the cubic phase at elevated temperatures. A detailed dielectric study of these crystals across the phase transition is carried out at different frequencies. The crystals are found to exhibit pronounced dielectric dispersion in the kHz frequency range. The results support the view that these transitions are of order–disorder type. The dielectric behaviour at temperatures above Tc is discussed in terms of modulus spectroscopy. An estimate of conductivity relaxation times above the phase transition temperatures made from modulus spectroscopy data gives values of 3.1, 12.2 and 17.7 μs for KClO4, RbClO4, and CsClO4, respectively.

Item Type:	Journal Article
Publication:	Physica Status Solidi A
Publisher:	John Wiley & Sons
Additional Information:	Copyright of this article belongs to John Wiley & Sons.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	24 Nov 2010 09:29
Last Modified:	24 Nov 2010 09:29
URI:	http://eprints.iisc.ac.in/id/eprint/33993

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