Relaxation dynamics in the strong chalcogenide glass-former of Ge22Se78

被引：13

作者：

Li, Pengfei

Zhang, Yaqi

Chen, Zeming

Gao, Peng

Wu, Tao

Wang, Li-Min ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

基金：

中国国家自然科学基金;

关键词：

ENTHALPY RELAXATION; STRUCTURAL RELAXATION; KINETIC FRAGILITY; GLASSFORMING LIQUIDS; SE-77; NMR; TRANSITION; SCATTERING; RIGIDITY; ORIGIN; MODES;

D O I：

10.1038/srep40547

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The enthalpy relaxation is performed in the glassy Ge22Se78 to understand the dynamic behaviors. The structure of the glass is examined by X-ray diffraction and Raman spectra. The dynamic parameters such as the fragility, stretching exponent and non-linear factor are determined. A low fragility of m = 27 is exhibited for the chalcogenide, however, the stretching exponent is found not to have a larger value. The enthalpy relaxation spectra are constructed for various glass formers, and a relationship between the fragility and the symmetry of the spectra is demonstrated. The dynamic results are used to evaluate the structure of the Ge22Se78 glass.

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页数：8

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