Growth, thermal and spectral properties of Nd3+-doped NaGd(MoO4)2 crystal

Single crystals of the nonlinear optical material, l-arginine bis(trifluoroacetate), with dimensions of 32 × 21 × 4 mm3 were grown by the temperature-lowering method from its aqueous solution. The crystal structure was determined using X-ray single-crystal diffraction at 93 K. X-ray powder diffraction, Fourier transform infrared, and Raman spectroscopic investigations were used to characterize the grown crystal. Morphological analysis reveals that the crystal is a rhombohedron with the major forms of (001), (101), and (100). UV−visible−NIR absorption spectrum and second harmonic generation were investigated to explore its characteristic optical features. Thermogravimetric (TG), differential thermal analysis (DTA), derivative thermogravimetric (DTG), and differential scanning calorimetry (DSC) studies were carried out to characterize the thermal behaviors of the grown crystals. In addition, the specific heat at low temperature and thermal expansion coefficients along the principal axes were determined. I...

Growth, Morphology, Thermal, Spectral, Linear, and Nonlinear Optical Properties of l-Arginine Bis(trifluoroacetate) Crystal

Good-quality single crystals of the nonlinear optical (NLO) crystal l-histidinium-4-nitrophenolate 4-nitrophenol (LHPP) with a large size of 40 × 25 × 10 mm3 have been grown by the slow cooling method. Its morphology has been indexed to reveal that the crystal is a rhombohedra with major forms of (−100) and (−101). The optical transmittance range has been identified by UV–vis NIR studies. Second-harmonic generation (SHG) on powder samples has been measured using the Kurtz and Perry technique, and the results display that LHPP is a phase-matchable NLO material with its SHG efficiency being 3.55 times as large as that of KDP. Its specific heat and the principal thermal expansion along the principal crystal axes have been measured at different temperatures. The average principal thermal expansion coefficients have been calculated on the basis of experimental measurements between 298 and 410.5 K, and the relationship between the structure and the thermal properties has been discussed. Surface morphologies of ...

Bulk Crystal Growth and Optical and Thermal Properties of the Nonlinear Optical Crystal l-Histidinium-4-nitrophenolate 4-Nitrophenol (LHPP)

Optical, mechanical and thermal studies of nonlinear optical crystal l-arginine acetate

Growth mechanism, dislocation etching and mechanical properties of L-arginine phosphate and deuterated L-arginine phosphate

The thermal expansion, specific heat, dielectric constant, and resistivity of the novel organic nonlinear crystal, L-arginine phosphate monohydrate have been measured as a function of temperature The thermal expansion is highly anisotropic and has been interpreted on the basis of crystal structure The dielectric constant and resistivity exhibit a temperature dependence that is similar to that of an ionic crystal No anomalies are observed in these physical properties from the liquid nitrogen temperature up to its melting point

S. V. Subramanyam

Papers

Thermal and electrical properties of the novel organic nonlinear crystal L‐arginine phosphate monohydrate