Physical properties of the GexSe1-x glasses in the 0<x<0.42 range in correlation with their structure

Guang Yang, Yann Gueguen, Jean Christophe Sangleboeuf, Tanguy Rouxel, Catherine Boussard-Plédel, Johann Troles, Pierre Lucas, Bruno Bureau

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Physical properties, including mechanical, thermal and optical properties, have been investigated for chalcogenide glasses in the GexSe 1-x system, for x ranging between 0 and 0.42. In the 0<x<1/3 range, the elastic moduli and the glass transition temperature (Tg) evolve as would be expected from the chain crossing model or from the clustering model. The change is continuous and there is no incidence of the rigidity percolation threshold (〈r〉=2.4). Conversely, the chemical threshold (〈r〉=2.67) clearly induces a change in the compositional trend of these properties. In the x > 1/3 range, Tg decreases and the elastic moduli markedly increase, which is not expected from the continuously reticulated model. The change of the physical properties in this range is an indicator of the existence of separated Ge-rich domains.

Original languageEnglish (US)
Pages (from-to)54-59
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume377
DOIs
StatePublished - 2013

Keywords

  • Chalcogenide glasses
  • Elastic moduli
  • Glass transition
  • Structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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