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Proceedings Paper

Anomalous behaviour of antiferroelectric SmC(alpha)* phase
Author(s): A. Fafara; S. Wrobel; Wolfgang Haase; M. Marzec; Roman S. Dabrowski
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Paper Abstract

New liquid crystalline substance has been studied by means of frequency domain dielectric spectroscopy (FDDS) and electro-optic methods. Typical soft mode is visible in paraelectric SmA* phase. Temperature dependencies of dielectric increment and critical frequencies in SmCsub* are more complicated what suggests existing of SmC(alpha )* phase. There is no evidence of the Goldstone mode in the monotropic SmC(alpha )* phase what supports the idea of its antiferroelectric nature. It is confirmed by measurements of spontaneous polarization by the reversal current method. Two peaks appear on the opposite sides of the zero field. The temperature dependence of spontaneous polarization as well as FDDS measurements show that transition between the SmC(alpha )* and paraelectric SmA* phases seems to be a first order transition.

Paper Details

Date Published: 27 June 2002
PDF: 4 pages
Proc. SPIE 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications, (27 June 2002); doi: 10.1117/12.472139
Show Author Affiliations
A. Fafara, Jagiellonian Univ. (Poland)
S. Wrobel, Jagiellonian Univ. (Poland)
Wolfgang Haase, Darmstadt Univ. of Technology (Germany)
M. Marzec, Jagiellonian Univ. (Poland)
Roman S. Dabrowski, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 4759:
XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications

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