Thermodynamic,optical and switching parameters of a ferroelectric liquid crystalline material having SmA*-SmC*-SmBh* phase sequence |
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| Authors: | Ashwani Kumar Singh Amir Iqbal Upendra Bahadur Singh Roman S Dabrowski |
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| Institution: | 1. Centre of Material Sciences, University of Allahabad, Allahabad, India;2. Department of Physics, Ewing Christian College, University of Allahabad, Allahabad, India;3. Institute of Applied Sciences and Chemistry, Military University of Technology, Warsaw, Poland |
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| Abstract: | Thermodynamic and electro-optical characterization of a ferroelectric liquid crystalline material, namely ((S) (+) 4-(1-methylheptyloxy) phenyl 4′-octyloxybiphenyl-4-carboxylate) possessing paraelectric SmA*, ferroelectric SmC*, hexatic SmBh* and SmI* phases has been carried out. Phase identification has been done by optical and thermodynamic studies. Switching parameters viz. spontaneous polarization, switching time and rotational viscosity have been determined. The spontaneous polarization has been found to increase with decreasing temperature in SmC* phase. The switching time is found of the order of few milliseconds. |
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| Keywords: | Ferroelectric liquid crystal thermodynamic parameters spontaneous polarization switching time and rotational viscosity |
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