Structural,optical, electrical and dielectric properties of (Sr1-xMgx)(Sn0.5Ti0.5)O3 (X=0.00, 0.25, 0.50, 0.75) ceramics via solid state route

We have prepared (Sr_1-xMg_x)(Sn_0.5Ti_0.5)O₃, (X = 0.00, 0.25, 0.50, 0.75) samples by the solid state reaction method and studied the structural, optical, electrical modulus and the other dielectric properties of the samples with respect to variation in frequencies (1 × 10⁹ to 2 × 10⁹ Hz) using Impedance Analyzer. This study suggests that the XRD patterns of the samples have shown that this possesses cubic perovskite structure in space group Pm-3m and scanning electron microscope was used to analyze the grain size distribution and porosity of the ceramic. The dielectric properties of these materials were strongly dependent upon on concentration X as well as amount of frequencies. The existence of metal oxygen bonds of Sr–Ti–O was verified by Fourier Transform Infra Red (FTIR) spectrum at 540 cm⁻¹. The highest PL intensity of 716.38 that exhibits the green emission (508.5 nm) was obtained for the composition of (Sr_0.25Mg_0.75)(Sn_0.5Ti_0.5)O₃. AC conductivity slowly decreases with increasing Mg substitution and also the sample (Sr_0.25Mg_0.75)(Sn_0.5Ti_0.5)O₃ having the lowest (constant) value of conductivity at 1 GHz–2GHz.