Dielectric Relaxation of a Ferroelectric Liquid Crystal Showing Anomalous Behaviour Due to Polarization Inversion

摘要

The present study reports the dielectric study of a ferroelectric liquid crystal (FLC) material Felix 016/030 showing anomalous dielectric behaviour. This anomalous behaviour is explained on the basis of a model of dynamically fluctuating mixture of two interconvertible conformers, whose relative density changes with temperature. We have observed Goldstone mode of dielectric relaxation in the frequency range covered. The experimental results have been corrected for low and high frequency range and used to determine dielectric permittivity. The anomalous behaviour of dielectric permittivity has also been verified by discussing the temperature dependence behaviour of P_S/Sin θ term where Ps is spontaneous polarization of the sample.