Transition thresholds in GexAsySe1-x-y glasses

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

doi:10.1063/1.3653602

Transition thresholds in Ge_xAs_ySe_1-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 proceeding › Conference contribution › peer-review

2 Citations (Scopus)

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 Ge₂Se_6/2. 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 language	English
Title of host publication	International Conference on Advances in Condensed and Nano Materials, ICACNM-2011
Pages	34-37
Number of pages	4
DOIs	https://doi.org/10.1063/1.3653602
Publication status	Published - 2011
Event	International Conference on Advances in Condensed and Nano Materials, ICACNM-2011 - Chandigarh, India Duration: 23 Feb 2011 → 26 Feb 2011

Publication series

Name	AIP Conference Proceedings
Volume	1393
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	International Conference on Advances in Condensed and Nano Materials, ICACNM-2011
Country/Territory	India
City	Chandigarh
Period	23/02/11 → 26/02/11

Access to Document

10.1063/1.3653602

Cite this

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title = "Transition thresholds in GexAsySe1-x-y glasses",

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.",

keywords = "Chalcogenide, Density, Elastic moduli, Glasses, Raman scattering",

author = "Wang, {R. P.} and T. Wang and Choi, {D. Y.} and S. Madden and B. Luther-Davies",

year = "2011",

doi = "10.1063/1.3653602",

language = "English",

isbn = "9780735409637",

series = "AIP Conference Proceedings",

pages = "34--37",

booktitle = "International Conference on Advances in Condensed and Nano Materials, ICACNM-2011",

note = "International Conference on Advances in Condensed and Nano Materials, ICACNM-2011 ; Conference date: 23-02-2011 Through 26-02-2011",

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Wang, RP, Wang, T, Choi, DY , Madden, S & Luther-Davies, B 2011, Transition thresholds in Ge_xAs_ySe_1-x-y glasses. in International Conference on Advances in Condensed and Nano Materials, ICACNM-2011. AIP Conference Proceedings, vol. 1393, pp. 34-37, International Conference on Advances in Condensed and Nano Materials, ICACNM-2011, Chandigarh, India, 23/02/11. https://doi.org/10.1063/1.3653602

TY - GEN

T1 - Transition thresholds in GexAsySe1-x-y glasses

AU - Wang, R. P.

AU - Wang, T.

AU - Choi, D. Y.

AU - Madden, S.

AU - Luther-Davies, B.

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

KW - Chalcogenide

KW - Density

KW - Elastic moduli

KW - Glasses

KW - Raman scattering

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