Size-dependent magnetism of deposited small iron clusters studied by x-ray magnetic circular dichroism -: art. no. 057201
Size-dependent magnetism of deposited small iron clusters studied by x-ray magnetic circular dichroism -: art. no. 057201
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DOI：
10.1103/physrevlett.89.057201
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发表时间：
2002-07-29
影响因子：
8.6
通讯作者：
Wurth, W
中科院分区：
文献类型：
--
作者：
Lau, JT;Föhlisch, A;Wurth, W
用圆极化同步辐射研究了沉积在超薄镍薄膜上的小铁团簇的尺寸效应。利用求和规则，从x射线磁性圆二色谱中提取了轨道磁矩和自旋磁矩。轨道磁矩与自旋磁矩之比随团簇大小而变化很大，反映了磁性对团簇大小和几何形状的依赖关系。这些变化可以用小星系团中增强的轨道矩来解释。
The size-dependent magnetic properties of small iron clusters deposited on ultrathin nickel films have been studied with circularly polarized synchrotron radiation. With the use of sum rules, orbital and spin magnetic moments have been extracted from x-ray magnetic circular dichroism spectra. The ratio of orbital to spin magnetic moments varies considerably with cluster size, reflecting the dependence of magnetic properties on cluster size and geometry. These variations can be explained in terms of enhanced orbital moments in small clusters.