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The local structure from two experimental atomic probes: EXAFS and Mossbauer spectroscopies

机译:来自两个实验性原子探针的局部结构:EXAFS和Mossbauer光谱

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The aim of the present study is to determine the correlations between two experimental atomic probes used to investigate the structure of disordered solids: the extended X-ray absorption fine structure (EXAFS) and the Mossbauer spectroscopy (MS). The study has been performed in a series of metallic glasses of composition (FexCo1-x)(80)B-20 (x = 0.06, 0.1, 0.2, 0.35, 0.5, 0.80, 1). The EXAFS spectroscopy on the Fe and the Co K-edge has been used to determine the local structure and its changes with composition. From the Fe-57 MS we have obtained the hyperfine parameters: isomer shift (IS), hyperfine fields, and its standard deviation at the Fe nuclei. We have established that the IS is correlated with the distance between Fe or Co and their first neighbour metallic atoms (RFe-M and RCo-M) and the standard deviation of hyperfine field distribution is due to the disorder of interatomic distances inside the first coordination shell of Fe. (C) 2001 Published by Elsevier Science B.V. [References: 12]
机译:本研究的目的是确定用于研究无序固体结构的两种实验性原子探针之间的相关性:扩展X射线吸收精细结构(EXAFS)和莫斯鲍尔光谱(MS)。该研究是在一系列成分为(FexCo1-x)(80)B-20(x = 0.06、0.1、0.2、0.35、0.5、0.80、1)的金属玻璃中进行的。 Fe和Co K边缘的EXAFS光谱已用于确定局部结构及其随组成的变化。从Fe-57 MS中,我们获得了超精细参数:异构体位移(IS),超精细场及其在Fe核上的标准偏差。我们已经确定,IS与Fe或Co与它们的第一个相邻金属原子(RFe-M和RCo-M)之间的距离相关,并且超精细场分布的标准偏差是由于第一配位内部的原子间距离无序造成的铁壳。 (C)2001年由Elsevier Science B.V.出版[参考文献:12]

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