Abstract
The particular features of the local electronic and local crystal structures of the mixed-valence compound Sm1 − x Y x S are studied by the XAFS spectroscopy methods in the temperature range 20–300 K for the yttrium concentration x = 0.17, 0.25, 0.33, and 0.45. The temperature behavior of the valence of Sm, as well as of the lengths and the Debye-Waller factors of the bonds Sm-S, Sm-Sm(Y), Y-S, and Y-Sm(Y), has been determined. The violation of the Vegard law has been observed. A model for the estimation of the energy width of the 4f level and of its position with respect to the Fermi level is proposed.
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Original Russian Text © A.P. Menushenkov, R.V. Chernikov, V.V. Sidorov, K.V. Klementiev, P.A. Alekseev, A.V. Rybina, 2007, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 132, No. 1, pp. 114–120.
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Menushenkov, A.P., Chernikov, R.V., Sidorov, V.V. et al. Low temperature features of the local structure of Sm1 − x Y x S. J. Exp. Theor. Phys. 105, 99–104 (2007). https://doi.org/10.1134/S1063776107070217
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DOI: https://doi.org/10.1134/S1063776107070217