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Proceedings Paper

Room-temperature ferroelectric mixtures based on a chiral epoxy compound
Author(s): M. Marzec; A. Wrobel; S. Wrobel; Wolfgang Haase; Roman S. Dabrowski
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Paper Abstract

Two mixtures: W-90 and W-91 containing an epoxy compound as a chiral dopant have been studied using dielectric and electrooptic methods. W-90 mixture shows a phase sequence Is-N*-SmC* whereas W-91 mixture - Is-N*- SmA*-SmC*. One of the objectives of the paper was to study the transition order between ferroelectric and paraelectric phases. Dielectric spectra were measured using 10micrometers EHC cells. In SmC* phases of both mixtures a broad Goldstone mode dielectric spectrum has been found. Switching properties of both mixtures have been studied by using LINKAM 5 micrometers thick cells. Tilt angle and spontaneous polarization have been measured in the SmC* phase versus temperature. Dielectric and electrooptic data are discussed in terms of the mean field model.

Paper Details

Date Published: 1 February 1998
PDF: 4 pages
Proc. SPIE 3318, Liquid Crystals: Physics, Technology, and Applications, (1 February 1998); doi: 10.1117/12.299948
Show Author Affiliations
M. Marzec, Jagiellonian Univ. (Poland)
A. Wrobel, Jagiellonian Univ. (Poland)
S. Wrobel, Jagiellonian Univ. (Poland)
Wolfgang Haase, Technische Hochschule Darmstadt (Germany)
Roman S. Dabrowski, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 3318:
Liquid Crystals: Physics, Technology, and Applications
Jolanta Rutkowska; Stanislaw J. Klosowicz; Jerzy Zielinski; Jozef Zmija, Editor(s)

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