Abstract
The far infrared spectra of lithium thallium tartrate single crystals have been studied for E//a and E//b at 300 K – 80 K and 5 K. A soft mode has been followed from 21 to 11 cm−1 giving strong evidence that the transition is displacive. A large birefringence is observed.
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Gerbaux, X., Hadni, A., Pierron, J. et al. Soft mode and far infrared spectra of ferroelectric lithium thallium tartrate at low temperatures. Int J Infrared Milli Waves 6, 131–140 (1985). https://doi.org/10.1007/BF01009615
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DOI: https://doi.org/10.1007/BF01009615