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Article Dans Une Revue Journal of Alloys and Compounds Année : 2019

Local order in binary Ge-Te glasses – An experimental study

Résumé

The structure of GexTe100-x (x = 14.5, 18.7, 23.6) glasses prepared by twin roller quenching technique was investigated by neutron diffraction, X-ray diffraction and Ge-K-edge X-ray absorption spectroscopy measurements. Large scale structural models were obtained for each composition by fitting the experimental datasets in the framework of the reverse Monte Carlo technique. It was found that the majority of Ge and Te atoms satisfy the 8-N rule. Simulation results indicate that Ge-Ge bonding is not significant for x = 14.5 and 18.7. The shape and position of the first peak of the Ge-Ge partial pair correlation function evidence the presence of corner sharing tetrahedra already in compositions (x = 14.5 and 18.7) where 'sharing' of a Te atom by two Ge atoms could be avoided due to the low concentration of Ge.
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hal-01870682 , version 1 (10-08-2021)

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Pal Jóvári, Andrea Piarristeguy, Annie Pradel, Ildikó Pethes, Ivan Kaban, et al.. Local order in binary Ge-Te glasses – An experimental study. Journal of Alloys and Compounds, 2019, 771, pp.268 - 273. ⟨10.1016/j.jallcom.2018.08.323⟩. ⟨hal-01870682⟩
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