Relation between Spontaneous Polarization and Rotational Viscosity in Enantiomeric Mixtures of Ferroelectric Liquid Crystals

Abstract

Spontaneous polarization P _s and rotational viscosity of the C-director η_c were measured in two series of mixtures of L- and D-enantiomers of ferroelectric liquid crystals. It was confirmed that η_c is independent of optical purity, while P _s depends on it almost linearly. The results of η_c are totally different from the recent results achieved by Dubal et al., who showed that high P _s accompanies high η_c. An explanation is given for the discrepancy, suggesting that the present results are more reliable.