1C17 反強誘電性液晶における電場-温度相図(物理・物性)

抄録

By using a photoelastic modulator (PEM) we have made E (Electric field) -T (Temperature) phase diagrams of antiferroelectric liquid crystals. PEM has a merit that we can quickly measure both the birefigence and the tilted angle of index ellipsoid at the same time. In this study, we clearly observed a tricritical point between SmA and SmC_α^*. Besides, we found other small changes in SmC_α^* and SmC_A^* phase, which may be brought about by local structure change or deformation of helix.