摘要：Ferroelectric liquid crystals exhibit a variety of remarkable properties and find use in technical applications such as optical displays. Dielectric spectroscopy studies of these compounds provide data on their static and dynamic properties. In this study, the dielectric and optical behaviour of the ferroelectric liquid crystal mixture ZLI-3654 has been investigated in a temperature range of 30°C to 62°C. The dielectric constant and the dielectric loss of the mixture has been measured in different phases in a frequency range of 100 Hz to 10 MHz on an impedance/gain phase analyzer. The dielectric study has exhibited relaxation behaviour giving rise to different relaxation frequencies for given temperatures. These have been used to calculate the relaxation time and activation energies in SmC* phases of the sample. The observed dielectric constant and loss follow Cole-Cole behaviour in the ferroelectric phase. Various phases observed from these studies have also been identified under a cross polarizer for planar alignment of the sample. The optical transmittance data have also been taken and used to calculate the optical rotatory power for the sample.
关键词：Physics; Condensed State of Matter;ferroelectric liquid crystals, dielectric permittivity, relaxation frequency,optical rotatory power
