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

Pál Jóvári, Andrea Piarristeguy, Annie Pradel, Ildikó Pethes, Ivan Kaban, Stefan Michalik, Jacques Darpentigny, Roman Chernikov

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1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)268-273
Number of pages6
JournalJournal of Alloys and Compounds
Volume771
DOIs
Publication statusPublished - Jan 15 2019

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Keywords

  • Diffraction
  • EXAFS
  • Modelling
  • Simulation
  • Telluride glass

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Jóvári, P., Piarristeguy, A., Pradel, A., Pethes, I., Kaban, I., Michalik, S., Darpentigny, J., & Chernikov, R. (2019). Local order in binary Ge-Te glasses – An experimental study. Journal of Alloys and Compounds, 771, 268-273. https://doi.org/10.1016/j.jallcom.2018.08.323