Growth and studies of gamma-glycine crystals doped with zinc sulfate

T.Gladys Vimala, E.Bena Jothy, P.Selvarajan

Single crystals of undoped and zinc sulphate doped gamma-glycine crystals were grown by slow evaporation solution growth technique using water as the solvent. Undoped gamma-glycine salt was prepared by using alpha-glycine and sodium chloride. 1 mole% of zinc sulfate was added as the dopant to the gamma-glycine to prepare the doped sample. Solubility of the samples was measured using water as the solvent at different temperatures. The grown crystals of undoped and zinc sulfate doped gamma-glycine were harvested after a growth  period of 30 days. The lattice parameters were found by XRD method. The relative SHG efficiency was measured for both the samples by Kurtz-Perry method. Hardness  parameters were determined at different applied loads. Dielectric behavior of the samples was studied by measuring dielectric constant and loss factor at various frequencies and temperatures. LDT studies were carried out for the samples to find the laser damage threshold values. Photoconductivity was measured for the samples at different applied electric fields.