Investigation of the magnetic and electrochemical properties of A-site double-doping La0.7SrxMg0.3-xFeO3 Perovskite

The sol-gel citrate auto-combustion process was used for obtaining polycrystalline nano compounds of La0.7SrxMg0.3-xFeO3 that included varying quantities of Sr(x = 0.00, 0.01, 0.15, and 0.20) nanopowders. Thermo gravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and UV-vis spectro photometry (UV-vis) were used to analyse these as-prepared particles. A vibrating sample magnetometer (VSM) was used to examine the nanomagnetic characteristics. Using CV, GCD, and EIS, the electrochemical characteristics were studied. The diameters of nanoparticle crystallites are determined to be between 21 and 28 nm, and they vary with increasing Sr and Mg concentrations. All samples have an orthorhombic structure with a Pnma (62) space group, according to XRD analysis. In accordance to the FT-IR spectra, the O-Fe-O metal oxygen bonds are present in the FeO(6 )octahedra. From the UV-vis spectra, the optical band gaps are discovered to be in the range of 2.08 to 2.13 eV. SEM images were used to examine the microstructure and surface morphology. Whereas the M-H loop of the doped samples tends to be weak ferromagnetic with increasing Sr concentration, which of the pure sample is paramagnetic. The Sr and Mg-doped material with x = 0.2 has increased magnetization, remanent magnetization, and coercive field to 0.4 emu/g, 0.14 emu/g, and 185 Oe respectively. In comparison to non-doped and double-doped LF samples, La0.7SrxMg0.3-xFeO3 (x=0.2) has a greater specific capacitance of 379 F/g at 10 mV/s..