科研之友
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摘要
Ag-x(Ge0.25Se0.75)(100-x) glasses with x varying from 0 to 25 have been shown to exhibit a conductivity threshold around x similar to 8-10. In this work, the structural changes induced by introduction of Ag in Ge25Se75 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.
- 出版日期2013-7
