Polarization switching and dielectric relaxations in ferroelectric SmecticC liquid crystal mixtures

Polarization switching responses and dielectric measurements have been carr ied out on two ferroelectric liquid crystal mixtures in planar cells. The r elational and bulk torsional viscosities have been calculated. These viscos ities show Arhenius type behavior. The activation energies of these materia ls 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 rimes of similar to 40 mus.