Investigation of coordination changes in substituted transition-metal oxides by K-edge XANES: beyond the pre-edge

Journal Article · Tue Oct 25 04:00:00 EDT 2011 · Journal of Electron Spectroscopy and Related Phenomena

DOI:https://doi.org/10.1016/j.elspec.2010.08.002· OSTI ID:1028016

Gaultois, Michael W; Greedan, John E; Grosvenor, Andrew P ^[1]

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1. Saskatchewan

Transition-metal oxides are important materials whose properties can be tuned through selective substitution of the constituent elements. For oxygen deficient materials, substitution can lead to variations in coordination number (CN). To understand these changes in CN, the pre-edge peak intensity, resulting primarily from a 1s to n-1d transition, from first-row transition-metal K-edge XANES spectra can be used. However, investigation of these peaks from spectra of second-row transition-metals can be difficult owing to lower spectral resolutions. It is shown here, through examination of Ca{sub 2}Fe{sub 2-x}Ga{sub x}O{sub 5}, SrFe{sub 1-x}Zr{sub x}O{sub 3-{delta}}, and (ZrO{sub 2}){sub x}(SiO{sub 2}){sub 1-x}, that changes in CN also lead to significant variations of the main absorption edge.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: FOREIGN
• OSTI ID: 1028016
• Journal Information: Journal of Electron Spectroscopy and Related Phenomena, Journal Name: Journal of Electron Spectroscopy and Related Phenomena Journal Issue: 3-6 Vol. 184; ISSN JESRAW; ISSN 0368-2048
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
COORDINATION NUMBER
OXIDES
OXYGEN
PEROVSKITES
SILICATES
SPECTRA
TRANSITION ELEMENTS