Structural studies of SrFeO{sub 3} and SrFe{sub 0.5}Nb{sub 0.5}O{sub 3} by employing XRD and XANES spectroscopic techniques
The perovskite based SrFeO{sub 3} and SrFe{sub 0.5}Nb{sub 0.5}O{sub 3} 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 SrFeO{sub 3} has a simple cubic perovskite structure, which is consistent with the previous literature results; whereas SrFe{sub 0.5}Nb{sub 0.5}O{sub 3} shows a tetragonal structure within P4mm space group. X-ray absorption results demonstrate that the valence state of Fe in SrFeO{sub 3} is (IV); however, it changes to (III) when 50% Nb{sup 5+} is substituted at the Fe sites. - Highlights: {yields} Structural studies by employing XRD and XANES spectroscopic techniques. {yields} Rietveld refinement confirmed SrFeO{sub 3} has cubic structure, space group Pm-3m. {yields} It is revealed that SrFe{sub 0.5}Nb{sub 0.5}O{sub 3} has tetragonal structure, in P4mm space group. {yields} From XANES results it is observed that Fe has valence state of (IV) in SrFeO{sub 3}. {yields} Doping of 50% Nb{sup 5+} at Fe sites, changes Fe valence to (III) in SrFe{sub 0.5}Nb{sub 0.5}O{sub 3}.
- OSTI ID:
- 22066342
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Journal Issue: 10 Vol. 62; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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