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Proceedings Paper

Observation of SmC(alpha)* by dielectric measurements
Author(s): Jolanta Rutkowska; Pawel Perkowski; Jerzy Kedzierski; Zbigniew Raszewski; Stanislaw J. Klosowicz; Roman S. Dabrowski; Krzysztof L. Czuprynski
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Paper Abstract

The aim of our work was precise dielectric permittivity measurements of compound: (See paper for formula) Results of spontaneous polarization, tilt angle in the SmC* phase and first dielectric permittivity measurements of all phases of this compound were presented by us. The phase transition to SmC* phase is characterized by strong maximum for low frequencies and minimum for high frequencies of dielectric responses. Thus in 118 degree(s)C for our compound one can see phase transition to SmC* phase2. From the linear temperature dependences of relaxation frequency fR and the inverse dielectric strength 1/Δε(perpendicular) obtained by fitting experimental values ε' and ε" to Cole-Cole equation, the SmC )* (in the narrow temperature regions) is detected due to the change of the slope. The relaxation process observed in the SmC )* phase is strongly modified under bias, thus it is probably connected with the helicity of SmC )* e.g. ferroelectric-like structure of this phase.

Paper Details

Date Published: 27 June 2002
PDF: 6 pages
Proc. SPIE 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications, (27 June 2002); doi: 10.1117/12.472146
Show Author Affiliations
Jolanta Rutkowska, Military Univ. of Technology (Poland)
Pawel Perkowski, Military Univ. of Technology (Poland)
Jerzy Kedzierski, Military Univ. of Technology (Poland)
Zbigniew Raszewski, Military Univ. of Technology (Poland)
Stanislaw J. Klosowicz, Military Univ. of Technology (Poland)
Roman S. Dabrowski, Military Univ. of Technology (Poland)
Krzysztof L. Czuprynski, Military Univ. of Technology (Poland)

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

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