Structural, Vibrational and Physical Properties on Tetramethyammonium Cadmium Bromide Ferroelectric Single Crystal

Abstract

INTRODUCTIONIn current years, metal organic complexes have attracted good attention owing to a result of their application in second and third harmonic generation, optical bistability, laser driven fusion, laser remote sensing, optical disc data storage, medical and spectroscopic image processing, colour display and optical communication [1][2][3]. The metallic organic complexes combined the benefits of each the organic and inorganic substances. Many new materials are having a wide application inside the area of frequency conversion [4]. Typically these compounds are fashioned through weak hydrogen and van der Waals bonds. However, the use of some organic crystals are substantially restrained to high power laser packages because of their demerits such as low laser harm threshold, negative mechanical, low thermal balance and difficulty in producing big sized crystals. To conquer the above said negative aspects, an alternative magnificence of fabric which combines both the fine elements of organic and inorganic referred to as metal organic has been advanced [5]. This type of metal organic compounds containing organic molecules are connected to metal atoms by way of carbon-metal bonds [6][7][8] Ferroelectric crystals of tetramethylammonium cadmium bromide (TMACB) has been grown by slow evaporation solution growth technique at room temperature. Single crystal X-ray diffraction analysis revealed the newness of the crystal structure belonging to the hexagonal crystal system with lattice parameters a = 9.257 Å, c = 6.9167 Å and α = β = 90º, γ = 120º. The functional groups in the complex were identified using FT-IR and FT-Raman analyses. The thermal stability and decomposition details were studied through TG/DTA analyses. The grown crystal was subjected to surface morphology by SEM analysis and the optical properties was studied by UV-VIS-NIR analysis.From the photoluminescence studies, it was confirmed that the grown crystal has been green emission. The Vickers microhardness test conducted on the grown crystal suggests that the crystal has a relatively low mechanical strength. The dielectric constant and dielectric loss were calculated by varying the frequencies at room temperature. Dielectric studies of the grown crystal had been measured in the temperature range of 313 to 453 K.