Abstract

We have studied the pyroelectric behavior of both low molecular weight and polymeric ferroelectric liquid crystals. The alignment and electric quality of the pyroelectric LC samples is found to strongly influence the measured pyrosignal. The pyroelectric current is recorded as a function of temperature, and by a calibration procedure absolute values of the pyroelectric coefficient can be obtained. For a well-aligned siloxane copolymer FLC with high spontaneous polarization, a maximum value of about 13 nC/cm2.K for the pyroelectric coefficient was evaluated, comparable to values found for low-molar mass compounds.© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

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