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Title: Electroclinic measurement of the coefficients of Landau expansion of some ferroelectric liquid crystals
Authors: Padmini, H.P.
Madhusudana, N.V.
Shivkumar, B.
Keywords: Ferroelectric liquid crystals
Electroclinic effect
Soft mode
Issue Date: 1994
Publisher: Indian Academy of Sciences, Bangalore, India.
Citation: Bulletin of Materials Science, 1994, Vol.17, p1119-1129.
Abstract: The electroclinic effect in the smectic A phase of ferroelectric liquid crystals is a sensitive probe for measuring the soft mode response near the A-C* transition point. It is possible to evaluate several coefficients of the Landau theory describing the A-C* transition by simultaneously measuring the frequency dependence of both the optical signal and the current through the sample. We have made such measurements on a couple of homologous series [2S,3S]-4′-(2-chloro-3-methyl pentanoyloxy) phenyl-trans-4″-n alkoxy cinnamates synthesized in our laboratory. The results show that the Landau meanfield theory is adequate to describe the A-C* phase transition in these compounds.
Description: Presented at the 15th International Liquid Crystal Conference, Budapest, 3-8 July 1994.
ISSN: 0250-4707
Appears in Collections:Research Papers (SCM)

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