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arXiv 1802.07005cond-mat.mtrl-sci
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Co2MnSi(001)/Ag(001)界面高自旋极化共振态的特征

Signature of a highly spin polarized resonance state at Co2MnSi(001)/Ag(001) interfaces

Christian Lidig, Jan Minár, Jürgen Braun, Hubert Ebert, Andrei Gloskovskii, Alexander Kronenberg, Mathias Kläui, Martin Jourdan

摘要:

利用高能X射线光电子能谱(HAXPES)研究了半金属Co2 MnSi(100)Heusler薄膜与Ag(100)、Cr(100)、Cu和Al层的界面。在具有Ag(100)界面的Co2 MnSi样品上的实验显示出接近费米边缘的特征光谱肩特征,该特征在Co2 MnSi(100)与其他金属层的界面处被强烈减弱或抑制。发现该特征与Co2 MnSi(100)层直接相关,如通过具有参考非磁性膜(即,没有Heusler层)的对照实验所反映的。通过与HAXPES计算结果的比较,确定了该肩状特征源于与Co2 MnSi(100)的高自旋极化表面共振有关的界面态。

英文摘要:

We investigated interfaces of halfmetallic Co2MnSi(100) Heusler thin films with Ag(100), Cr(100), Cu and Al layers relevant for spin valves by high energy x-ray photoemission spectroscopy (HAXPES). Experiments on Co2MnSi samples with an Ag(100) interface showed a characteristic spectral shoulder feature close to the Fermi edge, which is strongly diminished or suppressed at Co2MnSi (100) interfaces with the other metallic layers. This feature is found to be directly related to the Co2MnSi(100) layer, as reflected by control experiments with reference non-magnetic films, i.e. without Heusler layer. By comparison with HAXPES calculations, the shoulder feature is identified as originating from an interface state related to a highly spin polarized surface resonance of Co2MnSi (100).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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