期刊
JOURNAL OF SYNCHROTRON RADIATION
卷 22, 期 -, 页码 1450-1458出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600577515017178
关键词
cobalt L-edge; NEXAFS; branching ratio; site symmetry; I(L-3) / I(L-2) ratio
资金
- LDRD project - Directorate of Berkeley Lab
- Director, Office of Science/BES, of US DoE [DE-AC02-05CH11231]
- US Department of Energy [DE-AC02-05CH11231]
The electronic structure of a material plays an important role in its functionality for different applications which can be probed using synchrotron-based spectroscopy techniques. Here, various cobalt-based compounds, differing in crystal structure, ligands surrounding the central metal ion and morphology, have been studied by soft X-ray absorption spectroscopy (XAS) at the Co L-edge in order to measure the effect of these parameters on the electronic structure. A careful qualitative analysis of the spectral branching ratio and relative intensities of the L-3 and L-2 peaks provide useful insight into the electronic properties of compounds such as CoO/Co(OH)(2), CoCl2 center dot 6H(2)O/CoF2 center dot 4H(2)O, CoCl2/CoF2, Co3O4 (bulk/nano/micro). For further detailed analysis of the XAS spectra, quantitative analysis has been performed by fitting the spectral profile with simulated spectra for a number of cobalt compounds using crystal field atomic multiplet calculations.
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