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EXAFS study of the local order in Ge-As-Se glasses

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Date

2013

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Abstract

The nearest-neighbour environment of the Ge, As and Se atoms in ternary GexAsySe1-x-y systems with same mean coordination number (MCN = 2.5) have been investigated by the Extended X-ray Absorption Fine Structure Spectroscopy (EXAFS). For all the glass compositions, Ge, As and Se are always 4, 3 and 2 coordinated, respectively. Ge atoms are bonded to Se atoms exclusively in the compositional range studied. Homopolar bonds are formed between some As or Se atoms in non-stoichiometric glasses. The results suggest a combined effect of chemical ordering and topological in this system.

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Keywords

Bonding structure, Chalcogenide glasses, Synchrotron radiation

Citation

URI

https://dspace-test.anu.edu.au/handle/1885/733730813

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DevOps Pure Testing

Source

Physics Procedia

Type

Conference article

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DOI

10.1016/j.phpro.2013.07.015

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