Fourfold coordinated Te atoms in amorphous GeCu 2Te 3 phase change material

P. Jóvári, Y. Sutou, I. Kaban, Y. Saito, J. Koike

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Amorphous GeCu 2Te 3 was investigated by X-ray diffraction and extended X-ray absorption fine structure measurements at the Ge, Cu and Te K-edges. Structural models were obtained by fitting the four experimental datasets simultaneously by reverse Monte Carlo simulation. It was found that Ge-Ge and Cu-Cu bonding are both significant. The average coordination numbers of Cu and Te, as well as Ge, are close to four. The high average coordination number of the network contributes to the enhanced thermal stability of amorphous GeCu 2Te 3.

Original languageEnglish
Pages (from-to)122-125
Number of pages4
JournalScripta Materialia
Volume68
Issue number2
DOIs
Publication statusPublished - 2013 Jan

Keywords

  • Chalcogenide glasses
  • EXAFS
  • Modeling
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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