Journal Article

PUBDB-2018-05497

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The structure of near stoichiometric Ge-Ga-Sb-S glasses: A reverse Monte Carlo study

Pethes, I. (Corresponding author) ; Nazabal, V. ; Chahal, R. ; Bureau, B. ; Kaban, I. ; Beuneu, B. ; Bednarcik, J.DESY* ; Jóvári, P.Extern*

2019
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jnoncrysol.2018.11.009  doi:10.3204/PUBDB-2018-05497

Abstract: The structure of Ge$_{22}$Ga$_3$Sb$_{10}$S$_{65}$ and Ge$_{15}$Ga$_{10}$Sb$_{10}$S$_{65}$ glasses was investigated by neutron diffraction (ND), X-ray diffraction (XRD), and extended X-ray absorption fine structure (EXAFS) measurements at the Ge, Ga and Sb K-edges. Experimental data sets were fitted simultaneously in the framework of the reverse Monte Carlo (RMC) simulation technique. Short range order parameters were determined from the obtained large-scale configurations. It was found that the coordination numbers of Ge, Sb and S are around the values predicted by the Mott-rule (4, 3 and 2, respectively). The Ga atoms have on average 4 nearest neighbors. The structure of these stoichiometric glasses can be described by the chemically ordered network model: Ge-S, Ga-S and Sb-S bonds are the most important. Long Sb-S distances (0.3–0.4 Å higher than the usual covalent bond lengths) are observed, suggesting that Sb atoms can be found in various local environments.

Note: © Elsevier B.V.

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Contributing Institute(s):

1. DOOR-User (DOOR)
2. Experimentebetreuung PETRA III (FS-PE)

Research Program(s):

1. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)

Experiment(s):

1. DORIS Beamline X1 (DORIS III)

Appears in the scientific report 2019

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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