Transition thresholds in GexAsySe1-x-y glasses

R. P. Wang*, T. Wang, D. Y. Choi, S. Madden, B. Luther-Davies

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    We designed and prepared several groups of glasses with a mean coordination number (MCN) from 2.2 to 2.94 in order to explore the effect of MCN and chemical compositions on the physical properties of the glasses. We found that, while glass transition temperature increases with increasing MCN, the density and elastic moduli of the glasses show two transition thresholds at MCN=2.45 and 2.65, respectively. Raman scattering measurements indicate that the former corresponds to merging of the 225cm-1 and 250cm-1 modes which is a symbol of the extinction of free Se, while the latter corresponds to the appearance of two new modes at 280-290cm-1 and 170cm-1 that come from the defect modes of ethanelike Ge2Se6/2. The analysis of the experimental results on the glasses with same MCN but different chemical compositions suggest that, while MCN is a primary factor to determine the physical properties of the ternary glasses, the chemical compositions could be second factor to tune the physical properties.

    Original languageEnglish
    Title of host publicationInternational Conference on Advances in Condensed and Nano Materials, ICACNM-2011
    Pages34-37
    Number of pages4
    DOIs
    Publication statusPublished - 2011
    EventInternational Conference on Advances in Condensed and Nano Materials, ICACNM-2011 - Chandigarh, India
    Duration: 23 Feb 201126 Feb 2011

    Publication series

    NameAIP Conference Proceedings
    Volume1393
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Conference

    ConferenceInternational Conference on Advances in Condensed and Nano Materials, ICACNM-2011
    Country/TerritoryIndia
    CityChandigarh
    Period23/02/1126/02/11

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