Magnetic linear and circular dichroism in core-level photoemission and magnetic circular x-ray dichroism in absorption for ultrathin films Fe/Pd(100).
Magnetic linear and circular dichroism in core-level photoemission and magnetic circular x-ray dichroism in absorption for ultrathin films Fe/Pd(100).
复制标题
核心级光电发射中的磁线性和圆二色性以及超薄膜 Fe/Pd(100) 吸收中的磁圆 X 射线二色性。
DOI：
10.1103/physrevb.54.373
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Hricovini
中科院分区：
文献类型：
--
作者：
Le Cann X;Boeglin;Carrière;Hricovini
在室温下外延生长在面心立方Pd（100）上的非晶态Fe层的FeL 2，3吸收边进行了磁性圆X射线二向色性（MCXD）实验。在磁性圆二向色性和线性二向色性中，将Fe 2 p和Fe 3 p光电发射随Fe/Pd（100）膜厚度的不对称依赖性与MCXD中同时实现的吸收光谱进行比较。磁性圆x射线二向色性结果表明，铁膜沿[010]方向沿着存在很强的面内各向异性，即使在室温下生长的超导铁膜也是如此。在2-3个等效单层膜的厚度范围内，铁的磁轨道矩比体铁的磁轨道矩增大了5倍[< L z>=（0.53±0.02）μ B]，而自旋矩几乎不受界面影响[2 < S z>=（2.17±0.15）μ B].在芯层光电发射中，对于2-ML Fe/Pd（100），线性（Fe 3 p）和圆形（Fe 2 p）磁二色性都显示出令人惊讶的非常低的不对称性。这似乎与在L2，3 Fe边缘处的磁二向色性信号的分析相矛盾，该分析导致该膜的总磁矩约为2.70 μ B。这些测量提供了与磁性圆二色性和磁性线性二色性技术分析磁性材料相关的参数。© 1996美国物理学会。
Magnetic circular x-ray dichroism (MCXD) experiments have been performed at the Fe L 2, 3 absorption edges on ultrathin bct Fe layer epitaxially grown at room temperature on fcc Pd (100). In the magnetic circular and linear dichroism the asymmetry dependence in the Fe 2p and Fe 3p photoemission with the thickness of the Fe/Pd (100) film is compared to the simultaneously achieved absorption spectra in the MCXD. The magnetic circular x-ray dichroism results evidence a strong in-plane anisotropy along the [010] direction of the iron film, even for the ultrathin bct iron films grown at room temperature. In the thickness range of 2–3 equivalent monolayers, the magnetic orbital moment of iron is enhanced by a factor 5 [< L z>=(0.53±0.02) μ B] compared to the bulk iron value, whereas the spin moment is meanly unaffected by the interface [2< S z>=(2.17±0.15) μ B]. In core-level photoemission, both linear (Fe 3p) and circular (Fe 2p) magnetic dichroism show surprisingly very low asymmetries for 2-ML Fe/Pd (100). This seems to be in contradiction with the analysis of the magnetic dichroic signal at the L 2, 3 Fe edges which leads for this film to a total magnetic moment about 2.70 μ B. These measurements offer parameters related to the analysis of magnetic materials with magnetic circular and magnetic linear dichroism techniques.© 1996 The American Physical Society.