Crystal Research and Technology
Cryst. Res. Technol. 41, 671 (2006) - Abstract -

Crystal growth, optical, mechanical and electrical properties of organic NLO material γ-glycine

K. Ambujam, S. Selvakumar*, D. Prem Anand*, G. Mohamed**, and P. Sagayaraj*

Department of Physics, Queen Mary’s College(Autonomous), Chennai 600 004, India
*Department of Physics, Loyola College, Chennai 600034, India
**Department of Physics, The New College, Chennai 600014, India

Keywords gel growth, NLO, single crystals, transmittance, microhardness, dielectric constant, TG, DTA, negative photoconductivity
PACS 81.10.-h
DOI 10.1002/crat.200510647

Single crystals of organic non-linear optical material, γ-glycine have been grown by gel method for the first time. The γ - phase is confirmed by single crystal XRD. The presence of various functional groups of γ- glycine are confirmed by FTIR. The UV-Vis-NIR spectrum reveals the high percentage of transmission of the sample in the entire visible region. The SHG of γ-glycine is confirmed by Kurtz powder technique. TGA-DTA studies indicate that the crystal is structurally stable upto 170°C. Microhardness investigations are conducted on the grown crystals. The dielectric constant measurements are carried out and the nature of variation of dielectric constant and dielectric loss in the frequency range of 50 Hz to 5 MHz is studied and reported. Photoconductivity studies of γ-glycine crystals revealed the negative photoconducting nature.




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