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Thermal expansion of LATGS crystals

Abstract The thermal expansion of triglycine sulphate crystals doped with L-α alanine (LATGS) has been studied around the phase transition temperature (30–60°C) using thermomechanical analysis, TMA. With increasing content of admixture, the transition temperature (T c) was shifted towards higher values, while the expansion of the crystals (ΔL/L 0) varied both in the para and ferroelectric phases. The transition width in doped crystals was found to be broad, and this broadening increased with increasing content of L-α alanine.