| Autor: |
Saito, Toshiaki, Katayama, Toshikazu, Emura, Ai, Sumida, Noa, Matsuoka, Nanae, Ishikawa, Takayuki, Uemura, Tetsuya, Yamamoto, Masafumi, Asakura, Daisuke, Koide, Tsuneharu |
| Zdroj: |
Journal of Applied Physics; Apr2008, Vol. 103 Issue 7, p07D712, 3p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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