| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1571703 | Materials Characterization | 2011 | 5 Pages |
The perovskite based SrFeO3 and SrFe0.5Nb0.5O3 materials have been synthesized by solid state reaction methods. The structural properties are investigated using a combination of X-ray diffraction and X-ray absorption fine structure spectroscopic techniques. From the Rietveld refinement of the X-ray diffraction data it has been observed that SrFeO3 has a simple cubic perovskite structure, which is consistent with the previous literature results; whereas SrFe0.5Nb0.5O3 shows a tetragonal structure within P4mm space group. X-ray absorption results demonstrate that the valence state of Fe in SrFeO3 is (IV); however, it changes to (III) when 50% Nb5+ is substituted at the Fe sites.
► Structural studies by employing XRD and XANES spectroscopic techniques. ► Rietveld refinement confirmed SrFeO3 has cubic structure, space group Pm-3m. ► It is revealed that SrFe0.5Nb0.5O3 has tetragonal structure, in P4mm space group. ► From XANES results it is observed that Fe has valence state of (IV) in SrFeO3. ► Doping of 50% Nb5+ at Fe sites, changes Fe valence to (III) in SrFe0.5Nb0.5O3.
