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Proceedings Paper

Physical properties of components of mixture with induced Sm CA* phase
Author(s): Jolanta Rutkowska; Pawel Perkowski; Jerzy Kedzierski; Zbigniew Raszewski; Roman S. Dabrowski; S. Gauza; Krzysztof L. Czuprynski; Emilia Miszczyk
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Paper Abstract

The aim of our work was the investigating of compounds not having SmCA* phase, but in their mixtures for some concentration ranges induced smectic SmCA* was observed. Physical macroscopic properties such as temperature dependencies of the spontaneous polarization PS, the tilt angle (theta) and the electric permittivity (epsilon) (perpendicular) were measured for three compounds and their mixture. The investigated mixture exhibited antiferroelectric order in a broad concentration range. The large thermal hysteresis of the transition between ferroelectric and antiferroelectric phases for this mixture was demonstrated using dielectric method. We have tried to explain the origin of the induced SmCA* phase on the basis of the molecular structure of molecules of investigated compounds obtained from theoretical study by using semi-empirical quantum mechanical calculations method MINDO/3.

Paper Details

Date Published: 12 May 2000
PDF: 8 pages
Proc. SPIE 4147, Liquid Crystals: Chemistry, Physics, and Applications, (12 May 2000); doi: 10.1117/12.385666
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)
Roman S. Dabrowski, Military Univ. of Technology (Poland)
S. Gauza, Military Univ. of Technology (Poland)
Krzysztof L. Czuprynski, Military Univ. of Technology (Poland)
Emilia Miszczyk, Radom Technical Univ. (Poland)

Published in SPIE Proceedings Vol. 4147:
Liquid Crystals: Chemistry, Physics, and Applications
Stanislaw J. Klosowicz; Jolanta Rutkowska; Jerzy Zielinski; Jozef Zmija, Editor(s)

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