Macroscopic properties of mixed chiral smectic liquid crystals |
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Authors: | M Glogarov J Pavel S S Bawa D Demus S Diele G Pelzl |
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Institution: | M. Glogarová, ,J. Pavel,S. S. Bawa,D. Demus,S. Diele,G. Pelzl |
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Abstract: | Binary mixtures of chiral and non-chiral smectogens, DOBAMBC and DBHP respectively, exhibit a chiral smectic C phase in two separated concentration regions (about 0-20 and 60-100 mol per cent of DOBAMBC) and a chiral smectic I phase in the region of 60-100 mol per cent of DOBAMBC. For the S*cphase, the temperature and the concentration dependences of the spontaneous polarization, the tilt angle and the helical pitch were determined. The electric field switching properties of the S*iphase have been studied. For higher concentrations, the switching is similar to that of the S*iphase of pure DOBAMBC. When the concentration of DOBAMBC is lowered, bistable switching is observed. |
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