In recent years, various seeding techniques were used for melt growth to obtain maximum perfect crystal. In order, delocalized electrons rich organic nonlinear optical single crystal 2-hydroxy biphenyl with dimension of 25x15x8mm³ was grown by top seeded melt growth technique. The growth rate was observed 5mm/h. The seed orientation was optimized for fast growth. The morphological growth habits were analyzed. Scanning electron microscopy studies have been carried out on the surface of the grown crystal to investigate the nature of growth and defects on the crystal. The lattice parameters of the grown crystal were determined by single crystal X-ray diffraction technique. The grown crystals were characterized by powder XRD, FT-IR, FT-Raman and UV-Vis-NIR techniques. Thermal properties of grown crystal were studied by thermogravimetric analysis. The melting point of grown crystal was confirmed by differential scanning calorimetry analysis. The micro hardness values were measured for parallel and perpendicular face to growth direction. Second harmonic generation efficiency was measured using Q-switched Nd:YAG laser. Dielectric studies have been carried out for the grown crystal in the frequency range of 50Hz to 5MHz at various temperature and the results were discussed in detail.

1. FULLTEXT: Growth and characterization of 2-hydroxy biphenyl single crystals by top seeded melt growth method, Microsoft Office Document, 0MB

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