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Title: A simple electro-optic technique for studying the electroclinic effect in the smectic A∗ phase
Authors: Datta, Soma
Roy, Arun
Keywords: Liquid crystals
Phase transitions
Issue Date: Sep-2011
Publisher: Taylor & Francis
Citation: Liquid Crystals, 2011, Vol.38, p1193
Abstract: The critical behaviour of the electroclinic response in the chiral smectic A∗ phase in the vicinity of the second-order smectic A∗ to smectic C∗ phase-transition temperature has been investigated using a new electro-optic technique. The temperature variation of the electroclinic coefficient, the relaxation frequency and the coefficient of the quartic term in the tilt angle in the Landau free energy expansion have been studied. The electroclinic coefficient diverges with decreasing temperature as the smectic A∗ to smectic C∗ phase-transition temperature is approached with a critical exponent, as predicted in the mean field Landau theory. The measured quartic coefficient varies strongly with temperature, contrary to the usual assumptions of the mean field Landau theory.
Description: Restricted Access.
ISSN: 0267-8292
1366-5855 (online)
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Copyright: 2011 Taylor & Francis
Appears in Collections:Research Papers (SCM)

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