Effect of topological thresholds on thermal behaviour of germanium telluride glasses containing metallic additive |
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| Authors: | K Ramesh S Asokan KS Sangunni ESR Gopal |
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| Institution: | (1) Department of Physics, Indian Institute of Science, Bangalore 560012, India, IN;(2) Department of Instrumentation, Indian Institute of Science, Bangalore 560012, India, IN |
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| Abstract: | Differential Scanning Calorimetric (DSC) studies on AgxGe15Te85-x glasses have been undertaken over a wide range of compositions, to understand the effect of topological thresholds on thermal
properties. It is found that the compositional dependence of glass transition temperature (T
g
), crystallization temperature (T
c
), activation energy for crystallization and thermal stability show anomalies at the rigidity percolation threshold. Unusual variations also observed in different thermal properties at
the composition x = 20, clearly establishes the occurrence of chemical threshold in these glasses.
Received: 27 January 1998 / Revised: 12 June 1998 / Accepted: 3 July 1998 |
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| Keywords: | PACS 61 43 -j Disordered solids - 61 43 Fs Glasses - 65 90 +i Other topics in thermal properties of condensed matter |
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