Abstract
Single crystals of l-glutamine doped triglycine sulfate (LGTGS) were grown from aqueous solution by low-temperature solution growth technique using slow cooling method. The LGTGS crystals exhibit prominent morphological changes in the (1 0 1) and (0 1 0) planes. Lattice parameter values were determined by single-crystal XRD analysis. The powder X-ray diffraction confirms the crystalline nature of LGTGS. The presence of dopants in the crystal lattice was qualitatively confirmed by FTIR analysis. The UV–vis–NIR spectrum was recorded to study the optical transparency of the grown crystals. Microhardness studies were carried out using Leitz Weitzler hardness tester at room temperature. The dielectric studies were carried out to identify the phase transition temperature and the dielectric behavior. The P– E hysteresis loops were recorded at 50 Hz to find the values of spontaneous polarization ( P s) and coercive field ( E c).
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