Abstract

The dielectric response of binary mixture of liquid crystals 4 -cyano -4-pentyl - biphenyl and Cholesteryl Oleyl Carbonate as a function of temperature has been studied. The microwave cavity spectrometer has been used to measure the relative shift, width and amplitude of the resonance profile at a fixed frequency 9.0G Hz. The Slater's perturbation equations have been used to analyze the measured data and permittivity and dielectric loss has been studied in terms of relative shift and relative width respectively. The relaxation time has also been calculated. The transition temperature for the mixture has been found as modified from those of constituent liquid crystals considered and transition temperatures for mixture are 296.8 and 323K. The shift of transition is towards nematic liquid crystal.

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