Dielectric relaxation modes in liquidcrystalline mixture

Abstract

Mixture of two liquid crystalline compounds (which do not exhibit antiferroelectric or ferrielectric phase separately) shows ferrielectric phase in a broad temperature range. The dielectric spectroscopy technique was used for investigation of collective molecular motions in the mixture. Two relaxation modes were detected in the ferrielectric phase and the soft mode in the SmA* phase. The temperature dependence of the parameters of the dielectric relaxation modes are presented and discussed.