Advances in theoretical and experimental XAFS studies of thermodynamic properties, anharmonic effects and structural determination of fcc crystals

Nguyen Van Hung (), Cu Sy Thang, Nguyen Ba Duc, Dinh Quoc Vuong and Tong Sy Tien
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Nguyen Van Hung: Institute of Research and Development, Duy Tan University
Cu Sy Thang: Institute of Geological Sciences (IGS), Vietnam Academy of Science and Technology (VAST)
Nguyen Ba Duc: Tan Trao University
Dinh Quoc Vuong: Cam pha School, Quang Ninh Education & Training Department
Tong Sy Tien: University of Fighting & Prevention

The European Physical Journal B: Condensed Matter and Complex Systems, 2017, vol. 90, issue 12, 1-8

Abstract: Abstract Thermodynamic properties, anharmonic effects and structural determination of fcc crystals have been studied based on the theoretical and experimental Debye–Waller factors presented in terms of cumulant expansion up to the third order, thermal expansion coefficient, X-ray absorption fine structure (XAFS) spectra and their Fourier transform magnitudes. The advances in these studies are performed by the further development of the anharmonic correlated Einstein model primary only for approximating three first XAFS cumulants into the method using that all the considered theoretical and experimental XAFS parameters have been provided based on only the calculated and measured second cumulants. The obtained cumulants describe the anharmonic effects in XAFS contributing to the accurate structural determination. Numerical results for Cu are found to be in good agreement with the experimental values extracted by using the present advanced method and with those obtained by the other measurements.

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1140/epjb/e2017-80383-1

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