Transition threshold in Ge{sub x}Sb{sub 10}Se{sub 90−x} glasses

Journal Article · Fri Mar 21 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4869260· OSTI ID:22271184

Wei, Wen-Hou ^[1]; Fang, Liang ^[1]; Shen, Xiang ^[2]; Wang, Rong-Ping ^[3]

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1. Department of Applied Physics, Chongqing University, Chongqing 401331 (China)
2. Laboratory of Infrared Material and Devices, Advanced Technology Research Institute, Ningbo University, Ningbo 315211 (China)
3. Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Laser Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200 (Australia)

Ge{sub x}Sb{sub 10}Se{sub 90−x} glasses with Ge content from 7.5 to 32.5 at. % have been prepared by melt-quench technique, and the physical parameters including glass transition temperature (T{sub g}), density (ρ), compactness (C), shear elastic moduli (C{sub s}), compression elastic moduli (C{sub c}), refractive index (n), and optical bandgap (E{sub g}) have been investigated. While all these physical parameters show threshold behavior in the glass with a chemically stoichiometric composition. Raman spectra analysis also indicates that, with increasing Ge content, Se-chains or rings gradually disappear until all Se-atoms are consumed in the glass with a chemically stoichiometric composition. With further increasing Ge content, homopolar Ge-Ge and Sb-Sb bonds are formed and the chemical order in the glasses is violated. The threshold behavior of the physical properties in the Ge{sub x}Sb{sub 10}Se{sub 90−x} glasses can be traced to demixing of networks above the chemically stoichiometric composition.

• OSTI ID: 22271184
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIMONIDES
DENSITY
ELASTICITY
ELECTRONIC STRUCTURE
ENERGY GAP
GERMANIUM SELENIDES
GLASS
RAMAN SPECTRA
REFRACTIVE INDEX
SHEAR
STOICHIOMETRY
TRANSITION TEMPERATURE
YOUNG MODULUS