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.
URI:	http://hdl.handle.net/2289/2879
ISSN:	0267-8292 1366-5855 (Online)
Alternative Location:	http://dx.doi.org/10.1080/02678299308027664
Copyright:	1993 Taylor & Francis
Appears in Collections:	Research Papers (SCM)

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