X-ray absorption fine structure study of short-range order of iron in Fe/Al multilayers
X-ray absorption fine structure study of short-range order of iron in Fe/Al multilayers
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DOI：
10.1063/1.372972
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发表时间：
2000-04
影响因子：
3.2
通讯作者：
D. Meyer;K. Richter;P. Paufler;P. Gawlitza;T. Holz
中科院分区：
文献类型：
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作者：
D. Meyer;K. Richter;P. Paufler;P. Gawlitza;T. Holz
给出了脉冲激光沉积制备的6×(4.3 nm Fe/10.4 nm Al)多层膜的Fe-K吸收边荧光x射线吸收精细结构(XAFS)实验的定量分析结果。荧光XAFS实验与X射线驻波激发相结合。这种结合在一个实验中允许铁荧光的深度可控激发，因此可以进行短程顺序的深度分辨分析。深度分辨分析表明，不存在尖锐的Fe/Al或Al/Fe界面，而是存在扩展的中间层区域。该结构保留了块体α-Fe的结构。在铁层的上半部分，37At。在Fe的近邻和次近邻中发现了%Al，而在下半部发现了80At。有%的Al原子出现。因此，与Al/Fe界面(Al在Fe上沉积Al)相比，Fe/Al界面(Fe在Al上的沉积)应该具有明显更大的混合区域。通过在固定地点进行的常规XAFS测量。
Results of quantitative analysis of fluorescence x-ray absorption fine structure (XAFS) experiments at the Fe–K absorption edge are presented for a 6*(4.3 nm Fe/10.4 nm Al) multilayer prepared by pulsed laser deposition. Fluorescence XAFS experiments have been combined with excitation of x-ray standing waves. This combination in one experiment allowed for a depth-controlled excitation of Fe fluorescence and hence for a depth-resolved analysis of short-range order. Depth-resolved analysis showed that instead of sharp Fe/Al or Al/Fe interfaces extended interlayer regions exist. The structure retained that of bulk α-Fe. In the upper half of the Fe layer 37 at. % Al as nearest and next nearest neighbors of Fe were found, whereas in the lower half 80 at. % Al atoms occur. Thus the Fe/Al interface (deposition of Fe on Al) should be characterized by an intermixing zone significantly larger in comparison to that of the Al/Fe interface (deposition of Al on Fe). By conventional XAFS measurement carried out at a fix...