Abstract
We report the results of XANES and EXAFS measurements performed on YBa2Cu3O7−x compounds withx ranging from 0 to 1. Data for Cu and YK-edges are presented and definite trends in the behaviour of the main near edge structures are singled out, which allow to address the question of the Cu and Y oxidation states and to elucidate the role of the chemical environment in determining the shape of the absorption lines. The inter-atomic distances as obtained by EXAFS generally agree with the results of X-ray diffraction data with the exception of the Y−O distances. Possible sources of this discrepancy are indicated.
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Sadly, Prof. G.M. Antonini died before the appearance of this paper
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Sacchi, M., Corni, F., Antonini, G.M. et al. X-ray absorption spectroscopy in YBa2Cu3O7−x superconductors with variable oxygen content. Z. Physik B - Condensed Matter 72, 335–343 (1988). https://doi.org/10.1007/BF01312819
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DOI: https://doi.org/10.1007/BF01312819