(جامعة النيلين - كلية الدراسات العليا, 2014-12-22) Yusif A. Alsabah; Abdelrahman A. Elbadawi; Mohamed A. Siddig
The synthesis, crystal structure, optical and dielectric properties calculations of new double perovskite materials Sr2AlVO6 was described. For that the X- Ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Ultra Violet visible (UV), and Impeadence spectroscopies were used. X-ray powder diffraction measurements show that these materials is crystallize in Orthorimbic perovskite structures with (Pnma) space group. Unit cell parameters, atomic positions, crystalline size and site occupancies were calculated by standared Rietveld method through the Fullprof programm. Lattice parameters for Sr2AlvO6 have the values; a = b = 5.5518 Å and c = 7.89380 Å. The Fourier infrared spectroscopy, UV spectroscopy and Impedance spectroscopy were applied to investigate the optical and dielectric properties of Sr2AlVO6 sample; exactly the energy gap, dielectric constant and bond vibration have been measured also.
Keywords: Double perovskite, X-Ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Ultra Violet visible spectroscopy (UV).
