Influence on Key Properties of Mn2+Doping in L-ornithine Monohydrochloride Single Crystals: A Non-Linear Optical Material

Pure and 1 mol%, 2 mol %, 5 mol% Mn2+ doped single crystals of L-ornithine monohydrochloride (LOMHCl) were successfully grown by conventional slow evaporation solution technique (SEST). Effect on crystalline perfection, thermal and mechanical stability and second harmonic generation efficiency on title compound has been explored in detail. Using the Powder X-ray diffraction (XRD) curve, the value of mechanical strain for 1 mol %, 2 mol % and 5 mol % doped crystals were calculated by W-H analysis and found 2.95 x10-3, 1.64 x 10-3 and 9.79 x 10 -4 respectively. The crystalline perfection in pure as well as in doped crystals was assessed by high-resolution XRD, which results in better crystalline perfection at small and modest level doping concentration. The thermal and mechanical behavior have also been investigated which reveals that incorporated dopant concentration increases both features of the grown crystals. Hardness no. is calculated from hardness curve and is found 1.06, 1.04, 1.04 and 1.03 for undoped and Mn2+ doped LOMHCl single crystals respectively. Effect of doping on the second harmonic generation (SHG) efficiency reveals the considerable enhancement and better correlation with the crystalline perfection.