Short-range order in Ge - As - Te glasses

Pál Jõvári, Pierre Lucas, Zhiyong Yang, Bruno Bureau, Ivan Kaban, Brigitte Beuneu, Jozef Bednarčik

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The structure of Te-rich (75-80 at.% Te) and Te-poor (40 at.% Te) Ge-As-Te glasses has been investigated by diffraction and extended X-ray absorption fine structure (EXAFS) measurements. Large-scale structural models have been created by fitting simultaneously diffraction and EXAFS datasets by the reverse Monte Carlo simulation technique. It is found that As-As bonds improve the fit quality in the case of Te-rich glasses while no Ge-Ge bonding is necessary in these compositions. In the Te-poor glasses, Te-Te homopolar bonds are also observed while Ge binds preferentially to Te rather than to As. Ge-As and Ge-Te coordination numbers do not change significantly with increasing Ge content.

Original languageEnglish (US)
Pages (from-to)1625-1632
Number of pages8
JournalJournal of the American Ceramic Society
Volume97
Issue number5
DOIs
StatePublished - May 2014

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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