کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1606220 | 1516220 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Local motifs in GeS2-Ga2S3 glasses
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
The structure of (GeS2)0.75(Ga2S3)0.25 and (GeS2)0.83(Ga2S3)0.17 glasses was investigated by Raman scattering, high energy X-ray diffraction and extended X-ray absorption fine structure (EXAFS) measurements at the Ga and Ge K-edges. The reverse Monte Carlo simulation technique (RMC) was used to obtain structural models compatible with diffraction and EXAFS datasets. It was found that the coordination number of Ga is close to four. While Ge atoms have only S neighbors, Ga binds to S as well as to Ga atoms showing a violation of chemical ordering in GeS2-Ga2S3 glasses. Analysis of the corner- and edge-sharing between [GeS4/2] units revealed that about 30% of germanium atoms participate in the edge-shared tetrahedra.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 673, 15 July 2016, Pages 149-157
Journal: Journal of Alloys and Compounds - Volume 673, 15 July 2016, Pages 149-157
نویسندگان
I. Pethes, V. Nazabal, R. Chahal, B. Bureau, I. Kaban, S. Belin, P. Jóvári,