Study the influence of oxygen-deficient (δ=0.135) in SrFeO3-δ nanoparticles perovskite on structural, electrical and magnetic properties

In this report, SrFeO3-delta nanoparticle perovskite sample was prepared by the co-precipitation method. Rietveld refinement of the X-ray diffraction (XRD) data of SrFeO3-delta sample showed that it has a cubic phase (space group: Pm3 m). The morphology and average size (11.15 nm) of the SrFeO3-delta nanoparticle samples were characterised by the high-resolution transmission electron microscope (HRTEM). Mossbauer spectroscopy and X-ray photoelectron spectroscopy (XPS) results showed that the iron exists in different oxidation states. The SrFeO3-delta nanoparticle sample exhibits a small energy band gap in the visible region. The ferroelectric nature in SrFeO3-delta nanoparticle sample has been deduced from the dielectric measurement which is confirmed by differential scanning calorimetric (DSC) study. The magnetic order in SrFeO3-delta nanoparticle sample has been deduced from the magnetic measurement which confirmed by Mossbauer spectroscopic study. Based on the obtained results, we concluded the presence of multiferroic nature in SrFeO3-delta nanoparticle sample.