Thermal, hardness and nonlinear optical studies on pure and amino acids (L-Glutamic acid, L-Valine) doped Copper Thiourea complex crystals for Laser applications

摘要

Amino acids (L-Glutamic acid, L-Valine) doped Copper Thiourea Complex crystals(GTC) are grown by solution growth technique. Slow cooling as well as slow evaporation methods were employed to grow these crystals. The concentration of dopants in the mother solution was 0.1 mol%. The solubility data for all dopants concentration-were determined. There is variation in pH value and hence, there is habit modification of the grown.crystals were characterized with FT-IR studies, SHG trace elements and dielectric studies reveal slight distortion of lattice parameter for the heavily doped CTC crystals. Thermal properties of the grown sample were analyzed by TG and DTA analysis. Mechanical properties of the amino acids doped CTC crystal were investigated by micro hardness studies. Moreover, the grown crystal shows high transparency in the visible and near IR regions. FT-IR spectra reveal strong absorption band at 1697 cm~(-1) for metal ion doped'crystals. TGA-DTA studies reveal good thermal stability. The dopants increase the hardness value of the material and it also depends on the concentration of the dopants. Amino acids doping improved the NLO properties. The material shows relatively high SHG efficiency than that of KDP. The detailed results on the spectral parameters, habit modifications and constant values will be presented.