Growth and morphology of ultrathin Fe films on Cu(001).
Growth and morphology of ultrathin Fe films on Cu(001).
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Cu(001) 上超薄 Fe 薄膜的生长和形貌。
DOI：
10.1103/physrevb.52.8528
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Kirschner
中科院分区：
文献类型：
--
作者：
Giergiel;Shen;Woltersdorf;Kirilyuk;Kirschner
根据扫描隧道显微镜获得的形貌数据，重新研究了面心立方Fe在Cu（001）表面上的赝晶薄膜的磁性与形貌之间的关系。两种类型的薄膜显示不同的磁性能进行了研究。发现在300 K下制备的膜以良好的逐层模式生长。它们的磁性似乎受到与马氏体fcc\ensuremath{\rightarrow}bcc转变有关的结构不稳定性的影响。薄膜沉积在130 K，后来在300 K退火生长在一个Stranski-Krastanov样的模式，导致在一个显着不同的表面形态。它们被发现是结构稳定的自旋重取向发生的区域。试图使这些薄膜的增强粗糙度与它们的磁性相关。最后讨论了形态逾渗与长程铁磁有序化的关系。第一层的渗透被发现是不足以建立在这些薄膜中的长程铁磁有序。
The relationship between magnetism and morphology of pseudomorphic ultrathin films of fcc Fe on Cu(001) is reexamined in view of morphological data obtained with scanning tunneling microscopy. Two types of films showing different magnetic properties were investigated. Films prepared at 300 K are found to grow in a good layer-by-layer mode. Their magnetism appears to be influenced by structural instabilities connected with a martensitic fcc\ensuremath{\rightarrow}bcc transformation. Films deposited at 130 K and later annealed at 300 K grow in a Stranski-Krastanov-like mode, resulting in a drastically different surface morphology. They are found to be structurally stable in the region where the spin reorientation takes place. An attempt is made to correlate the enhanced roughness of these films with their magnetic properties. Finally, the connection between the morphological percolation and the onset of long-range ferromagnetic ordering is discussed. The percolation of the first layer is found to be insufficient to establish long-range ferromagnetic ordering in these films.