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Title: Experimental determination of the flexoelectric coefficients of some nematic liquid crystals
Authors: Maheswara Murthy, P.R.
Raghunathan, V.A.
Madhusudana, N.V.
Issue Date: 1993
Publisher: Taylor & Francis
Citation: Liquid Crystals, 1993, Vol.14, p483 - 496
Abstract: We report measurements of the temperature variation of the flexoelectric coefficient (e1-e3) of a number of nematic liquid crystals like phenylcyclohexanes, cyanobiphenyls, etc. We have also measured (e1+e3) of a few systems using appropriate methods of applying an electric field gradient to the sample. In most of the systems, (e1-e3)/k, where k is a curvature elastic constant, is found to be positive and independent of temperature, as expected. However, in 4-heptyl-1-(4-cyanocyclohexyl)cyclohexane and a few other compounds with relatively flexible parts, |(e1-e3)/k| increases with temperature. We discuss the possible molecular origin of the sign and temperature dependence of the flexoelectric coefficients of the systems studied.
Description: Restricted Access.
ISSN: 0267-8292
1366-5855 (Online)
Alternative Location:
Copyright: 1993 Taylor & Francis
Appears in Collections:Research Papers (SCM)

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