2A08 非線型誘電率測定による反強誘電性液晶の相転移の研究

抄録

We have measured the linear and the third-order dielectric constants of an antiferroelectric liquid crystal MHPOBC and mixtures of R- and S- enantiomers. In the optically pure and almost pure samples with the SmC_α^* phase, the third-order dielectric constant discontinuously increases at the transition point from SmA to SmC_α^*, while the linear dielectric constant is continuous with a small change of the slope in its temperature dependence. These behaviors were well explained by the Landau theory. The optical purity dependence of the Curie constant was also investigated.