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

Abstract

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