Unidirectional growth of ⟨001⟩ triglycine zinc chloride crystal by Sankaranarayanan-Ramasamy (SR) method and its characterization

Bulk nonlinear optical single crystal of triglycine zinc chloride (TGZC) of size 15 mm diameter and 50 mm length was successfully grown from solution by unidirectional growth method of Sankaranarayanan-Ramasamy (SR). The growth conditions were optimized and a maximum growth rate of 1.5 mm per day was realized. The crystal system and lattice parameters were confirmed by powder X-ray diffraction studies. The structural perfection of the SR method grown crystal has been analyzed by high resolution X-ray diffraction measurement. The UV-Vis-NIR studies show that the cutoff wavelength is around 240 nm. The dielectric measurements were carried out to determine the dielectric behavior for the crystal. The observations are made in the frequency range 1 kHz-2 MHz at the temperature range of 43-150 degrees C. The fluorescence spectra of grown TGZC single crystals exhibit emission peak at 485 nm. The microhardness measurements were used to analyze the mechanical strength of the grown TGZC crystal. The SHG efficiency of TGZC was confirmed by Kurtz-Perry powder method. (C) 2014 Elsevier B.V. All rights reserved.