Electronic and magnetic properties of Heusler alloy Co2MnSi epitaxial ultrathin films facing a MgO barrier studied by x-ray magnetic circular dichroism
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概要
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The electronic and magnetic states of an epitaxially grown full-Heusler alloy Co2MnSi (CMS) 1.1 nm (4 ML) thick ultrathin film and a CMS 50‐nm-thick film both facing an epitaxial MgO(001) tunnel barrier were element-specifically studied by means of x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD). The observed XAS and XMCD spectra revealed that both the CMS films were not oxidized. The Co and Mn spin magnetic moments for the 4 ML thick CMS film obtained by applying the sum rules were close to those for the 50‐nm-thick one and the theoretical values for bulk CMS with the L21 structure. These results indicate that 4 ML thick CMS ultrathin films facing a MgO barrier still retain the electronic and magnetic states for the L21 structure.
- American Institute of Physicsの論文
著者
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Koide Tsuneharu
Photon Factory Imss High Energy Accelerator Research Organization
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Katayama Toshikazu
Tohoku Univ. Sendai Jpn
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Yamamoto Masafumi
Fachbereich Physik And Forschungszentrum Optimas Technische Universitaet Kaiserslautern Erwin-schroedinger-strasse ...
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