Abstract
There are only few antiferroelectric liquid crystal (AFLC) materials, which have shown long temperature range Sm C A * phase near room temperature. One such material is chlorinated version of MHPOBC. In the present work we are reporting dielectric spectroscopy of this material over a frequency range of 1 Hz to 10 MHz for planar and homeotropic anchoring geometry of sample molecules. In the antiferroelectric Sm C A * phase, two relaxation processes have been observed under planar anchoring condition of molecules. These two dielectric processes are reported and discussed as a function of temperature, bias electric field and thickness of the sample.
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