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Ag–Ge–Se glasses: a vibrational spectroscopy study
Author(s) -
Le Parc R.,
Piarristeguy A.,
Frolet N.,
Ribes M.,
Pradel A.
Publication year - 2013
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4320
Subject(s) - raman spectroscopy , analytical chemistry (journal) , conductivity , materials science , molecular vibration , compressibility , spectroscopy , crystallography , chemistry , mineralogy , optics , thermodynamics , physics , chromatography , quantum mechanics
Ag x (Ge 0.25 Se 0.75 ) 100−x glasses with x varying from 0 to 25 have been shown to exhibit a conductivity threshold around x ~8–10. In this work, the structural changes induced by introduction of Ag in Ge 25 Se 75 glass have been investigated using Raman and infra‐red spectroscopies. In ambient conditions, changes are observed in position, width and intensity for vibrations assigned to Ge–Se bonds, showing that the tetrahedral network is relaxed and gains flexibility as Ag is introduced. High pressure experiments on two glasses containing 5 and 25 at.% Ag confirm that Ag‐rich (25%) glasses clearly exhibit higher compressibility than Ag‐poor (5%) glasses. Copyright © 2013 John Wiley & Sons, Ltd.