X-ray absorption and x-ray magnetic circular dichroism studies on a monatomic bcc-Co(001) layer facing an amorphous Al-O tunnel barrier

We studied the electronic states and magnetic moments of a bcc-Co(001) monatomic layer facing an amorphous Al-O tunneling barrier using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) at the L 2 , 3 core edges of Co. Both the XAS and XMCD measurements revealed that 1...

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Bibliographic Details
Published in:Journal of applied physics 2006-07, Vol.100 (2), p.023912-023912-4
Main Authors: Katayama, Toshikazu, Yuasa, Shinji, Saito, Shinji, Kurosaki, Yoshinari, Saito, Toshiaki, Kamino, Tomoyuki, Kobayashi, Kie, Suzuki, Yoshishige, Manaka, Hirotaka, Koide, Tsuneharu
Format: Article
Language:English
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Summary:We studied the electronic states and magnetic moments of a bcc-Co(001) monatomic layer facing an amorphous Al-O tunneling barrier using x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) at the L 2 , 3 core edges of Co. Both the XAS and XMCD measurements revealed that 1 monolayer (ML) Co is not oxidized. The magnetic moment of 1 ML bcc Co(001) facing the amorphous Al-O was observed to be almost the same as that of bulk Co. In contrast, the total magnetic moment of 1 ML bcc Co(001) facing a metallic Al layer was reduced by the effect of the proximity to Al atoms.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.2200407