Long-term physical ageing in As-Se glasses with short chalcogen chains

被引：28

作者：

Golovchak, R. ^{[1
,2
]}

Shpotyuk, O. ^{[1
,3
]}

Kozdras, A. ^{[4
]}

Vlcek, M. ^{[5
]}

Bureau, B. ^{[6
]}

Kovalskiy, A. ^{[2
]}

Jain, H. ^{[2
]}

机构：

[1] SRC Carat, Lviv Sci Res Inst Mat, UA-79031 Lvov, Ukraine

[2] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

[3] Jan Dlugosz Univ, Inst Phys, PL-42201 Czestochowa, Poland

[4] Opole Univ Technol, Fac Phys, PL-45370 Opole, Poland

[5] Univ Pardubice, Fac Chem, Dept Gen & Inorgan Chem, Pardubice 53210, Czech Republic

[6] Univ Rennes 1, CNRS, UMR 6226 Sci Chim Rennes, F-35042 Rennes, France

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 24期

关键词：

D O I：

10.1088/0953-8984/20/24/245101

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Long-term physical ageing of chalcogenide glasses, which occurs over tens of years, is much less understood than the short-term ageing. With Se-rich underconstrained As30Se70 glass as a model composition (consisting of Se-n chains with n <= 3 on average), a microscopic model is developed for this phenomenon by combining information from differential scanning calorimetry, extended x-ray absorption fine structure, Raman, and Se-77 solid state nuclear magnetic resonance spectroscopies. The accompanying changes in the electronic structure of these glasses are investigated by x-ray photoelectron spectroscopy. The data suggest ageing from cooperative relaxation, presumably involving bond switching or reconfiguration of As-Se-Se-As fragments.

引用

页数：7

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