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Structural, growth and characterizations of NLO crystal: Triglycinium calcium nitrate

Structural, Growth and Characterizations of NLO Crystal: Triglycinium Calcium Nitrate

M. Esthaku Peter1*, P. Ramasamy2

1Department of Physics, Easwari Engineering College, Chennai 600089, Tamilnadu, India

2Centre for Crystal Growth, SSN College of Engineering, Kalavakkam 603110, Tamilnadu, India

Adv. Mater. Lett., 2016, 7 (1), pp 83-88

DOI: 10.5185/amlett.2016.5944

Publication Date (Web): Dec 22, 2015

E-mail: mesthakupeter@gmail.com, esthaku1603@gmail.com

Abstract


Single crystals of triglycinium calcium nitrate, a semiorganic nonlinear optical (NLO) material, have been grown by slow solvent evaporation technique at room temperature. The size of the grown crystal is up to the dimension of 29×19×5 mm3. The structure of the crystal was analyzed by single crystal X-ray diffraction and the functional groups present in the sample were identified by FTIR spectral analysis in the range 4000-450 cm-1. The UV-vis-NIR studies was undertaken to find the transmittance in the ultraviolet and visible region. The efficiency of second harmonic generation was analyzed by Kurtz-Perry powder technique and compared with standard KDP crystal. Thermogravimetric and differential thermal analysis have been performed to determine the thermal stability of the crystal. Dielectric properties such as dielectric constant and dielectric loss were studied at various temperatures and frequencies. Vickers microhardness testing was carried out on the as-grown crystal surface to reveal the mechanical properties of the crystal. Etching studies were made on the as grown crystal to analyze the structural imperfection of the crystal. 

Keywords

Crystal growth, crystal structure, etching, X-ray diffraction.

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