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- W2024390189 abstract "We report for the first time a systematic study of X-ray absorption structures 20–30eV above the LIII edge (XANES) of homogeneous mixed valent (SmB6, YbAl2, CePd3...) and trivalent reference Rare-Earth compounds (e.g. GdB6, LaAl2, NdPd3). The XANES of integral valent compounds in simple structures (NaCl, AuCu3...), which is due to multiple scattering of the photoelectron on the neighbouring atomic shells, is characterized by a single peak. On the contrary the XANES of mixed-valent materials presents a splitted structure which replicates the edge structures. We interpret this splitting as a direct evidence for the existence of two threshold energies and corresponding presumably to two different Rare-Earth metal distances in agreement with 4f fluctuations. Finally, we shall propose a consistent picture for core hole spectroscopies (LIII edge, XANES, EXAFS and XPS) in mixed-valent materials." @default.
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- W2024390189 date "1986-01-01" @default.
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- W2024390189 title "Xanes study of trivalent and homogeneous mixed valent rare earth systems" @default.
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- W2024390189 doi "https://doi.org/10.1016/0038-1098(86)90531-4" @default.
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