Abstract
Results of the dc electrical conductivity (σ) measurements (from 90 to 420 K) on 15 compositions of the Cux(As0.4 Se0.3 Te0.3)100−x glasses (x from 0 to 30) are presented. Similar to that observed [1] in the composition dependencies of the mean atomic volume (V) and the glass transition temperature (Tg) of these glasses, it is possible to delineate three regions in the composition dependence of the σ of these glasses. (i) For addition of Cu up to 1 at %, the σ register a decrease compared to that of the parent As0.4Se0.3Te0.3 glass. (ii) For Cu > 1 at %, the conduction activation energy (ΔE) and the pre-exponential factor (C) decrease, with a concomitant increase in σ (at 250 K) by about six orders of magnitude. (iii) Both ΔE and C show saturation for Cu > 23 at %. The σ-composition data are examined using the model developed earlier [1] to understand, the V (and Tg)-composition dependencies of these glasses.
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Giridhar, A., Mahadevan, S. Electrical conductivity of Cux(As0.4Se0.3Te0.3)100−x glasses. Journal of Materials Science 34, 1281–1285 (1999). https://doi.org/10.1023/A:1004537828979
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DOI: https://doi.org/10.1023/A:1004537828979