Comparative study of mechanical, dielectric and electrical properties of solutic grown semi-organic NLO crystal glycine with additives-ammonium oxalate, potassium and barium nitrate

摘要

The semi-organic non-linear optical (NLO) crystals of y-glycinc (G), with additives like ammonium oxalate (AO), barium nitrate (BN) and potassium nitrate (PN) were grown by aqueous solution method. The mechanical properties like Vicker's micro hardness number (//v), stiffness constant (Cn) and yield strength (cv) of grown crystals have been evaluated. The dielectric constant and dielectric loss of the grown crystals have been investigated in the frequency range 10 kHz-10MHz. The dependence of ac conductivity on frequency of the applied field has been established. Studies confirm that the grown NLO crystals retain the merits of organic (SHG response and flexibility) and inorganic (good hardness) properties. Glycine ammonium oxalate (GAO) is a preferred material for device application compared to glycine barium nitrate potassium nitrate (GBNPN) crystal. Based on mechanical and electrical characterization, comparison has been made between the additives ammonium oxalate (AO), barium nitrate (BN) and potassium nitrate (PN).