抄録
The dielectrical and phase transition properties of some ferroelectric liquid crystals with different terminal groups in their molecular structures have been studied. The phase series were markedly dependent on the terminal structures. Dielectric properties of the mixture of these chiral smectic and non-chiral smectic liquid crystals also showed marked dependence on the composition and concentration of the mixture. That is, the sign inversion of spontaneous polarization was found in the binary mixture of chiral smectic and non-chiral smectic liquid crystals. The inversion temperature was sensitive to the concentration of ferroelectric liquid crystal. In the cell with surface treatments, unsymmetrical response was observed upon applying a stepwise field except at the temperature showing the sign inversion.
