Polarization switching and dielectric relaxations in ferroelectric Smectic C liquid crystal mixtures

Abstract

429-433<span style="font-size: 15.0pt;mso-bidi-font-size:8.0pt;font-family:" times="" new="" roman","serif""="">Polarization switching responses and dielectric measurements have been carried out on two ferroelectric liquid crystal mixtures in planar cell s. 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 <span style="font-size:16.0pt;mso-bidi-font-size: 9.0pt;font-family:" times="" new="" roman","serif""="">0.32 eV and <span style="font-size: 16.0pt;mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">0.37 eV. The spontaneous polarization has been measured using field reversal method. These mixtures show switching times of <span style="font-size:16.0pt; mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">~40μs. </span