Structure of chalcogenide glasses by neutron diffraction

Details Structure of chalcogenide glasses by neutron diffraction Structure of chalcogenide glasses by neutron diffraction

2008-01-06

arxiv.org/abs/0801.0868v1

Journal of Non-Crystalline Solids 353 (2006) 729-732

Physics

Chemical Physics

5 pages. Proceedings International Workshop Non-crystalline Solids, Gijon (Spain)

Scientific paper

10.1016/j.jnoncrysol.2006.12.036

The purpose of this work is to study the change in the structure of the Ge-Se network upon doping with Ag. The total structure factor S(Q) for two samples has been measured by neutron diffraction using the two-axis diffractometer dedicated to structural studies of amorphous materials, D4, at the Institut Laue Langevin. We have derived the corresponding radial distribution functions for each sample and each temperature, which gives us an insight about the composition and temperature dependence of the correlation distances and coordination numbers in the short-range. Our results are compatible with the presence of both GeSe4/2 tetrahedra and Se-Se bonds. The Ag atoms are linked to Se in a triangular environment. Numerical simulations allowing the identification of the main peaks in the total pair correlation functions have complemented the neutron diffraction measurements.

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