Yongyong Wang, Panpan Zhang, Qing Li, Gong Li
College of Physics, Henan Normal University, Xinxiang 453007, People's Republic of China.
Henan Key Laboratory of Photovoltaic Materials, Xinxiang 453007, People's Republic of China.
J Phys Condens Matter. 2020 Oct 20;33(3). doi: 10.1088/1361-648X/abbea4.
The structural evolution of ErAlCometallic glasses (MGs) at high pressure was studied through x-ray diffraction with synchrotron radiation. The compression ratio, differential structure factor, pair distribution function(), and relative resistance as functions of pressure were analyzed and discussed. A reversible polyamorphic transition with a clear hysteresis was detected in the ErAlCoMGs. The irreversible annihilation of free volume and voids led to a densification of the specimens. Electronic resistance measurements demonstrated that the transition was strongly correlated with the electronic structural evolution. The results provide a new insight into understanding the mechanisms of polyamorphism in MGs.
通过同步辐射X射线衍射研究了铒铝钴金属玻璃（MGs）在高压下的结构演变。分析并讨论了压缩比、微分结构因子、对分布函数（）以及相对电阻随压力的变化情况。在铒铝钴金属玻璃中检测到了具有明显滞后现象的可逆多形转变。自由体积和孔隙的不可逆湮灭导致了样品的致密化。电阻测量表明，这种转变与电子结构演变密切相关。这些结果为理解金属玻璃中多形性的机制提供了新的见解。
