12 May 2000 Physical properties of components of mixture with induced Sm CA* phase
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Proceedings Volume 4147, Liquid Crystals: Chemistry, Physics, and Applications; (2000) https://doi.org/10.1117/12.385666
Event: XIII International Conference on Liquid Crystals: Chemistry, Physics, and Applications, 1999, Krynica Zdroj, Poland
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.
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Jolanta Rutkowska, Pawel Perkowski, Jerzy Kedzierski, Zbigniew Raszewski, Roman S. Dabrowski, S. Gauza, Krzysztof L. Czuprynski, Emilia Miszczyk, "Physical properties of components of mixture with induced Sm CA* phase", Proc. SPIE 4147, Liquid Crystals: Chemistry, Physics, and Applications, (12 May 2000); doi: 10.1117/12.385666; https://doi.org/10.1117/12.385666
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