Diffractional, optical, electrical, NLO and surface studies of l-asparagine monohydrate lithium sulphate (LAMLS) single crystals

• Published in: Journal of materials science. Materials in electronics Vol. 33; no. 23; pp. 18846 - 18857
• Main Authors: Meena, M., Sundararajan, R. S., Manikandan, E., Shalini, M.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.08.2022; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Cut off wavelength; Dielectric properties; Differential thermal analysis; Emission analysis; Functional groups; Lithium; Materials Science; Mechanical properties; Microhardness; Nonlinear optics; Optical and Electronic Materials; Optical materials; Parameter identification; Photoluminescence; Second harmonic generation; Single crystals; Spectrum analysis; Stability analysis; Thermal stability; Unit cell; Yield point
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-08734-4

In this paper, single crystals of l -asparagine monohydrate lithium sulphate (LAMLS), semi organic nonlinear optical material were grownup by a slow evaporation growth approach. The LAMLS crystal has been subjected to a single X-ray diffraction analysis to identify the unit cell parameters and the crystal has been found to be orthorhombic an system with P2 1 2 1 2 1 space group. UV–Vis–NIR spectral analysis, it was shown that the crystals have good transmittance, lower cut-off wavelength at 246 nm and also calculated bandgap energy of the crystal. FT-IR and FT-Raman were carried out on the grown sample to identify the functional groups. In the photoluminescence spectrum, the emission peaks were noticed at 363 nm and 411 nm which implies the violet emission. The mechanical behaviour was studied by Vicker’s micro hardness tester. The investigation of dielectric characteristics of LAMLS was also accomplished. The thermal stability of the LAMLS crystal has been analysed by TG–DTA studies. The surface damage threshold of LAMLS crystal is determined as 23.12 GW/cm 2 . The enhancement of the second harmonic generation efficiency of LAMLS crystal was found to be 0.29 times higher than that of standard KDP.