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Local atomic and electronic structure of Al90FexCe10-x alloys: XAFS analysis.

Authors
Type
Published Article
Journal
Journal of synchrotron radiation
Publication Date
Volume
8
Issue
Pt 2
Pages
809–811
Identifiers
PMID: 11512939
Source
Medline
License
Unknown

Abstract

X-ray absorption fine structure (XAFS) above the Fe K-edge and the Ce L3-edge in amorphous Al90Fe(x)Ce10-x (x = 3, 5, and 7) alloys have been measured and analyzed. Quantitative analyses of the Fe K-edge and Ce L3-edge EXAFS spectra are limited to local structure parameters of the first coordination sphere. Using a theoretical multiple scattering (MS) approach, we show that the Fe and Ce XANES are sensitive to the structure of coordination spheres, which extend up to nearly 4.5 A. Comparison of experimental XANES spectra with theoretical MS results allows one to determine the local structure around the iron and cerium sites up to at least the third shell of atoms.

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