X-ray absorption spectroscopy and x-ray magnetic circular dichroism of epitaxially grown Heusler alloy Co2MnSi ultrathin films facing a MgO barrier

Saito, Toshiaki; Katayama, Toshikazu; Ishikawa, Takayuki; Yamamoto, Masafumi; Asakura, Daisuke; Koide, Tsuneharu

doi:10.1063/1.2824856


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X-ray absorption spectroscopy and x-ray magnetic circular dichroism of epitaxially grown Heusler alloy Co2MnSi ultrathin films facing a MgO barrier

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Title:	X-ray absorption spectroscopy and x-ray magnetic circular dichroism of epitaxially grown Heusler alloy Co2MnSi ultrathin films facing a MgO barrier
Authors:	Saito, Toshiaki Browse this author
	Katayama, Toshikazu Browse this author
	Ishikawa, Takayuki Browse this author
	Yamamoto, Masafumi Browse this author →KAKEN DB
	Asakura, Daisuke Browse this author
	Koide, Tsuneharu Browse this author
Issue Date:	26-Dec-2007
Publisher:	American Institute of Physics
Journal Title:	Applied Physics Letters
Volume:	91
Issue:	26
Start Page:	262502
Publisher DOI:	10.1063/1.2824856
Abstract:	We element specifically studied the electronic and magnetic states of epitaxially grown full-Heusler alloy Co2MnSi (CMS) 1.1 nm (4 ML) thick ultrathin films facing an epitaxial MgO(001) tunnel barrier by means of x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD). In situ reflection high-energy electron-diffraction observations indicated that the CMS films grew into the L21 structure. The observed XAS and XMCD spectra revealed that the CMS ultrathin film was not oxidized. The ratio of Mn and Co spin magnetic moments obtained by applying the sum rules was about 2.7, close to a theoretical value of 2.8 for CMS with the L21 structure.
Rights:	Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 91, 262502 and may be found at https://dx.doi.org/10.1063/1.2824856
Type:	article
URI:	http://hdl.handle.net/2115/50601
Appears in Collections:	情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山本眞史

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