Broken Chemical Order and Phase Separation in Ge sub x Se sub 1-x Glasses

The trend of broken chemical order in Ge sub x Se sub 1-x glasses displays a minimum at x = 3/8 as well as at x = 1/3. The composition dependence of site populations determined by Mossbauer spectroscopy can be quantitatively understood in terms of molecular phase separation in these glasses. The pro...

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Bibliographic Details
Published in:Solid state communications 1983-01, Vol.45 (2), p.183-185
Main Authors: Boolchand, P, Grothaus, J, Phillips, J C
Format: Article
Language:English
Online Access:Get full text
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Summary:The trend of broken chemical order in Ge sub x Se sub 1-x glasses displays a minimum at x = 3/8 as well as at x = 1/3. The composition dependence of site populations determined by Mossbauer spectroscopy can be quantitatively understood in terms of molecular phase separation in these glasses. The proposed molecular phases and their morphologies are discussed in terms of a quasi-equilibrium free energy for rapidly quenched-melts. It is shown that this general approach provides a microscopic basis for understanding the overall glass forming tendency not only in binary but also in many ternary chalcogenide glasses. 21 ref.--AA
ISSN:0038-1098