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Browse Journals & Magazines > Journal of Applied Physics ...> Volume:103 Issue:7 Help

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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10 Author(s)
Saito, Toshiaki ; Department of Physics, Faculty of Science, Toho University, Funabashi 274-8510, Japan ; Katayama, Toshikazu ; Emura, Ai ; Sumida, Noa
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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.

Published in:
Journal of Applied Physics  (Volume:103 ,  Issue: 7 )

Date of Publication: Apr 2008

Page(s):
07D712 - 07D712-3
ISSN :
0021-8979
Digital Object Identifier :
10.1063/1.2836676
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Apr 2008

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