Surface Magnetic Properties of Ultrathin Fe Films on W(110) Studied by Spin-Resolved Appearance Potential Spectroscopy
Surface Magnetic Properties of Ultrathin Fe Films on W(110) Studied by Spin-Resolved Appearance Potential Spectroscopy
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W(110) 上超薄 Fe 薄膜的自旋分辨显现势能谱研究表面磁性能
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
M. Donath
中科院分区：
文献类型：
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作者：
G. Rangelov;H. Kang;J. Reinmuth;M. Donath
利用自旋分辨外观电位谱（APS）的表面灵敏度，研究了W（110）表面超薄铁层的磁性能。研究了自旋不对称性随铁膜厚度的变化规律，并利用自旋不对称性监测了APS探测深度内的磁矩。自旋不对称数据显示，在薄膜厚度为$ensuremath{约}6$单层（ML）时，自旋不对称最大，这是由于在该厚度范围内薄膜形态复杂所致。对于较厚、结构松弛的薄膜，不同采样深度的APS测量结果显示，与子层的磁矩相比，Fe表面磁矩增强。在一个简单的模型中分析了自旋不对称数据。
The surface sensitivity of spin-resolved appearance potential spectroscopy (APS) was exploited to investigate the magnetic properties of ultrathin Fe layers on W(110). The spin asymmetry, used to monitor the magnetic moment within the probing depth of APS, was studied as a function of the Fe film thickness. The spin asymmetry data reveal a pronounced maximum at a film thickness of $ensuremath{approx}6$ monolayers (ML), which is attributed to the complex film morphology in this thickness range. For thicker, structurally relaxed films, APS measurements with variable sampling depth show the Fe surface magnetic moments enhanced compared with the moments of the sublayers. The spin asymmetry data are analyzed within a simple model.