Thermal, optical, mechanical and electrical properties of a novel NLO active l-phenylalanine l-phenylalaninium perchlorate single crystals

• Published in: Physica. B, Condensed matter Condensed matter, 2010, Vol.405 (1), p.65-71
• Main Authors: Cyrac Peter, A., Vimalan, M., Sagayaraj, P., Madhavan, J.
• Format: Article
• Language: English
• Subjects: Condensed matter; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystal growth from solution; Density; Dielectric constant; Dielectric properties; Electrical properties; Electronic transport in condensed matter; Exact sciences and technology; Microhardness; NLO; Nonlinearity; Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Perchlorates; Photoconduction and photovoltaic effects; photodielectric effects; Physics; Single crystals; Thermal properties
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2009.08.035

Single crystals of l-phenylalanine l-phenylalaninium perchlorate (LPAPCl), a semiorganic nonlinear (NLO) material have been successfully grown up to a size of 14 mm×5 mm×3 mm. The lattice parameters of the grown crystals are determined by single crystal XRD. The UV–Vis–NIR spectrum of LPAPCl show less optical absorption in the entire visible region. Nonlinear optical study reveals that the SHG efficiency of LPAPCl is nearly 1.4 times that of KDP. The laser damage density is found to be 7.4 GW/cm 2. The crystals are subjected to microhardness studies and the variation of the microhardness with the applied load is studied. The response of dielectric constant in the frequency region of 50 Hz to 5 MHz has been investigated. AC and DC conductivity and photoconductivity experiments are also carried out and the results are discussed.