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High tunnel magnetoresistance in fully epitaxial magnetic tunnel junctions with a full-Heusler alloy Co2Cr0.6Fe0.4Al thin film

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タイトル: High tunnel magnetoresistance in fully epitaxial magnetic tunnel junctions with a full-Heusler alloy Co2Cr0.6Fe0.4Al thin film
著者: Marukame, Takao 著作を一覧する
Ishikawa, Takayuki 著作を一覧する
Matsuda, Ken-Ichi 著作を一覧する
Uemura, Tetsuya 著作を一覧する
Yamamoto, Masafumi 著作を一覧する
発行日: 2006年 6月28日
出版者: American Institute of Physics
誌名: Applied Physics Letters
巻: 88
号: 26
開始ページ: 262503
出版社 DOI: 10.1063/1.2217166
抄録: Fully epitaxial magnetic tunnel junctions (MTJs) were fabricated with a Co-based full-Heusler alloy Co2Cr0.6Fe0.4Al (CCFA) thin film, whose composition was close to the stoichiometric one, and a MgO tunnel barrier. Cross-sectional high-resolution transmission electron microscope observations indicated that all layers of the CCFA/MgO/Co50Fe50 MTJ layer structure were grown epitaxially and were single crystalline. The microfabricated CCFA/MgO/Co50Fe50 MTJs exhibited high tunnel magnetoresistance (TMR) ratios of 90% at room temperature and 240% at 4.2 K. A high tunneling spin polarization of 0.79 at 4.2 K was obtained for the epitaxial CCFA films from the TMR ratios.
Rights: Copyright 2006 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. 88, 262503 and may be found at http://link.aip.org/link/?apl/88/262503
関連URI: http://link.aip.org/link/?apl/88/262503
資料タイプ: article
URI: http://hdl.handle.net/2115/50607
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 山本 眞史

 

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