title: Structural, optical, thermal and mechanical properties of Urea tartaric acid single crystals.
abstract: Urea tartaric acid (UT) an organic nonlinear optical (NLO) material was synthesized from aqueous solution and the crystals were grown by the slow evaporation technique. The single crystal X-ray diffraction (XRD) analysis revealed that the UT crystal belongs to the orthorhombic system. The functional groups of UT have been identified by the Fourier transform infrared spectral studies. The optical transparent window in the visible and near the IR regions was investigated. The transmittance of UT has been used to calculate the refractive index (n) as a function of the wavelength. The nonlinear optical property of the grown crystal has been confirmed by the Kurtz powder second harmonic generation test. The birefringence of the crystal was determined using a tungsten halogen lamp source. The laser induced surface damage threshold for the grown crystal was measured using the Nd:YAG laser. The anisotropic in mechanical property of the grown crystals was studied using Vicker's microhardness tester at different planes. The etch pit density of UT crystals was investigated. The thermal behavior of UT was investigated using the TG-DTA and DSC studies.
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: P
authors.initials: P
authors.lastname: Vinothkumar
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: K
authors.initials: K
authors.lastname: Rajeswari
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India.
authors.forename: R Mohan
authors.initials: RM
authors.lastname: Kumar
authors.affiliation: Department of Physics, Presidency College, Chennai 600 005, India. Electronic address: abhaskaran_68@yahoo.co.in.
authors.forename: A
authors.initials: A
authors.lastname: Bhaskaran
mesh_terms: D001718:Birefringence; D002152:Calorimetry, Differential Scanning; D003460:Crystallization; D006244:Hardness; D007834:Lasers; D055595:Mechanical Phenomena; D017711:Nonlinear Dynamics; D055620:Optical Phenomena; D017785:Photons; D012995:Solubility; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D019265:Spectroscopy, Near-Infrared; D013644:Tartrates / Q000737:chemistry*; D013696:Temperature; D013818:Thermogravimetry; D014508:Urea / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D013644:Tartrates; D014508:Urea; C029768:tartaric acid
keywords: Nonlinear optical material; Recrystallization; Single crystal growth; Solubility; X-ray diffraction