Machado K D, Sanchez D F, Maciel G A, Brunatto S F, Mangrich A S, Stolf S F
Departamento de Física, Centro Politécnico, Universidade Federal do Paraná, 81531-990, Curitiba, PR, Brazil.
J Phys Condens Matter. 2009 May 13;21(19):195406. doi: 10.1088/0953-8984/21/19/195406. Epub 2009 Apr 16.
The local atomic order of an amorphous Se(0.90)S(0.10) alloy produced by mechanical alloying was studied by x-ray diffraction and extended x-ray absorption fine structure (EXAFS) data obtained at three temperatures, T = 300, 200 and 30 K. From the cumulant analysis of the EXAFS data, structural properties such as average interatomic distances, average coordination numbers, Debye-Waller factors and anharmonicity, given by the third cumulant, were obtained. The results found indicate that there is alloying at an atomic level, and Se-S pairs are more disordered and distorted than Se-Se ones due to the milling process.
通过X射线衍射以及在三个温度（T = 300、200和30 K）下获得的扩展X射线吸收精细结构（EXAFS）数据，研究了通过机械合金化制备的非晶态Se(0.90)S(0.10)合金的局部原子排列。通过对EXAFS数据的累积量分析，获得了诸如平均原子间距离、平均配位数、德拜-瓦勒因子以及由第三累积量给出的非谐性等结构性质。研究结果表明，在原子水平上存在合金化现象，并且由于球磨过程，Se-S对比Se-Se对更加无序和扭曲。
