Exploring the structural, morphological, optical and magnetic properties of pure and Ni-doped Triple Perovskite La2SrFe2TiO9 for magneto-opto electronic applications

Abstract

The Present work represents the Structural, morphological, magnetic, and optical properties of Pristine and Ni-doped La2SrFe2TiO9 Triple Perovskite. The samples were synthesized by using the solid-state reaction approach. We have carried out the structural characterization of the La2SrFe2-xNixTiO9 (x = 0.0, 0.1, 0.2, 0.3 and 0.5) Triple Perovskite by using X-ray diffraction and found that all the synthesized samples were grown in a single phase with space group (Pnma) which has been confirmed further by Rietveld Refinement. The microstructural analysis and the elemental composition analysis were carried out using a Field Emission Scanning Electron Microscope (FE-SEM) and Energy dispersive spectroscopy (EDS) respectively. The morphological studies of the sample reveal that the grain size of the sample decreases (1.11–0.75 μm) with Ni Doping. The optical band gap of the samples was characterized by UV–vis spectroscopy measurements, and we have obtained the value of the energy band gap from 2.02 to 1.67 eV, confirming the application of the material in the Infrared region of the electromagnetic spectrum. The M − H measurements reveal the stabilized ferromagnetic character of the pure La2SrFe2TiO9 Triple Perovskite upon Ni doping. The XPS Studies confirm that Ni exists in the form of Ni2+ while Fe exists in the form of Fe3+. The magnetic measurements were understood theoretically by using the mathematical equation. The current study indicates the stability of the samples, and their possible utilisation in spintronics, magnetic storage devices, magneto-optoelectronics, and solar cell applications.