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Growth of Co and Fe on Cu(111): experiment and BFS based calculations

机译：Co和Fe在Cu（111）上的生长：实验和基于BFS的计算

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The structure and morphology of Co and Fe films grown on Cu(I 1 1) have been investigated by thermal energy atom scattering (TEAS) and low-energy electron diffraction (LEED). It has been found that the growth mode of Co and Fe can be greatly improved by using Pb as surfactant, although in the case of Fe this works only for the first bilayer. This shows that the two systems exhibit decisive differences already in the first stages of the growth process. In a second series of experiments, the effect of codepositing Co-Cu and Fe-Cu on the films quality was investigated. The results are very promising, and suggest that very flat, structurally ordered fcc Fe-Cu and Co-Cu films can be prepared by applying this technique together with the use of Pb as surfactant. These results were complemented by atomistic simulations based on the BFS method for alloys. Simulations performed in the low-coverage regime suggest that the early stages of growth are governed to a great extent by the affinity of Cu for Co and Fe. We have also performed temperature-dependent Monte Carlo simulations to determine the structure of superlattices formed by codeposition of Cu-Co and Cu-Fe. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 11]
机译：通过热能原子散射（TEAS）和低能电子衍射（LEED）研究了在Cu（I 1 1）上生长的Co和Fe膜的结构和形态。已经发现通过使用Pb作为表面活性剂可以大大改善Co和Fe的生长方式，尽管在Fe的情况下这仅对第一双层起作用。这表明两个系统在生长过程的第一阶段就已经表现出决定性的差异。在第二系列实验中，研究了共沉积Co-Cu和Fe-Cu对薄膜质量的影响。结果是非常有希望的，并且表明可以通过应用该技术以及使用铅作为表面活性剂来制备非常平坦，结构有序的fcc Fe-Cu和Co-Cu膜。这些结果得到了基于BFS方法对合金进行原子模拟的补充。在低覆盖率条件下进行的模拟表明，生长的早期阶段在很大程度上受Cu对Co和Fe亲和力的控制。我们还进行了取决于温度的蒙特卡洛模拟，以确定由Cu-Co和Cu-Fe共沉积形成的超晶格结构。 （C）2003 Elsevier Science B.V.保留所有权利。 [参考：11]

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