Polarization switching responses and dielectric measurements have been carried out on two ferroelectric liquid crystal mixtures in planar cells. The rotational and bulk torsional viscosities have been calculated. These viscosities show Arhenius type behavior. The activation energies of these materials evaluated from viscosity data have been found to be 0.32 eV and 0.37 eV. The spontaneous polarization has been measured using field reversal method. These mixtures show switching times of approx 40 #mu#s.
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