CRYSTAL GROWTH, XRD, MECHANICAL, FTIR, DIELECTRIC AND NONLINEAR OPTICAL PROPERTIES OF L-LYSINE OXALIC ACID CRYSTALS

Abstract

An organic nonlinear optical (NLO) crystal viz. L-lysine oxalic acid (LLOA) has been synthesized and grown in the form of single crystal by solution method with slow evaporation technique. Single crystal X-ray technique was used to find the crystal lattice parameters and structure. The FT-IR spectrum was recorded to identify the functional groups of the prepared sample. The fluorescence spectrum was recorded for the grown LLOA crystal and colour of emission and region are reported. The micro hardness was measured at different applied loads and work hardening coefficient was evaluated. Dielectric studies were carried out for the grown crystal LLOA and electrical properties were studied. The EDAX spectrum of the sample was recorded to identify the various elements in the crystal. LLOA crystal was powdered and the SHG efficiency was found by Kurtz-Perry technique.