Abstract
Abstract Physical properties of the organic material tanane1 do not allow sufficiently accurate polarization measurements. As an alternative, the following order parameters were studied: spontaneous shear strain x 6, (linearly coupled to spontaneous polarization P 3), and spontaneous birefringence Δn 6, shown to be proportional to the spontaneous strain. Results of induced birefringence and strain, above and below the transition temperature (Tc = 13.5°C), are reported and discussed.
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