Short-Range Order in Ge-As-Te Glasses

被引：19

作者：

Jovari, Pal ^{[1
]}

Lucas, Pierre ^{[2
]}

Yang, Zhiyong ^{[2
]}

Bureau, Bruno ^{[3
]}

Kaban, Ivan ^{[4
,5
]}

Beuneu, Brigitte ^{[6
]}

Bednarcik, Jozef ^{[7
]}

机构：

[1] Inst Solid State Phys, Wigner Res Ctr Phys, H-1525 Budapest, Hungary

[2] Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA

[3] CNRS, Equipe Verres & Ceram, Lab Sci Chim Rennes, UMR 6226, Rennes, France

[4] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

[5] IFW Dresden, Inst Complex Mat, D-01171 Dresden, Germany

[6] CEA Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, Saclay, France

[7] Deutsch Elektronen Synchroton DESY, D-22603 Hamburg, Germany

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2014年 / 97卷 / 05期

基金：

美国国家科学基金会;

关键词：

MONTE-CARLO-SIMULATION; FINE-STRUCTURE; CHEMICAL ORDER; CHALCOGENIDE GLASSES; ATOMIC-STRUCTURE; LOCAL-STRUCTURE; SCATTERING;

D O I：

10.1111/jace.12823

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The structure of Te-rich (75-80at.% Te) and Te-poor (40at.% Te) Ge-As-Te glasses has been investigated by diffraction and extended X-ray absorption fine structure (EXAFS) measurements. Large-scale structural models have been created by fitting simultaneously diffraction and EXAFS datasets by the reverse Monte Carlo simulation technique. It is found that As-As bonds improve the fit quality in the case of Te-rich glasses while no Ge-Ge bonding is necessary in these compositions. In the Te-poor glasses, Te-Te homopolar bonds are also observed while Ge binds preferentially to Te rather than to As. Ge-As and Ge-Te coordination numbers do not change significantly with increasing Ge content.

引用

页码：1625 / 1632

页数：8

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