Fabrication of Fully Epitaxial Co2Cr0.6Fe0.4Al/MgO/Co2Cr0.6Fe0.4Al Magnetic Tunnel Junctions

Marukame, T.; Ishikawa, T.; Hakamata, S.; Matsuda, K.-I.; Uemura, T.; Yamamoto, M.

Fabrication of Fully Epitaxial Co2Cr0.6Fe0.4Al/MgO/Co2Cr0.6Fe0.4Al Magnetic Tunnel Junctions

Marukame, T.; Ishikawa, T.; Hakamata, S. et al.

IEEE Transactions on Magnetics, 2007, 43(6), 2782-2784

Permalink : https://hdl.handle.net/2115/26426

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アクセス権	open access
URI	https://hdl.handle.net/2115/26426
タイトル	Fabrication of Fully Epitaxial Co2Cr0.6Fe0.4Al/MgO/Co2Cr0.6Fe0.4Al Magnetic Tunnel Junctions
著者	Marukame, T. ; Ishikawa, T. ; Hakamata, S. ; Matsuda, K.-I. ; Uemura, T. ; Yamamoto, M.
著者名 Marukame, T.
著者名 Ishikawa, T.
著者名 Hakamata, S.
著者名 Matsuda, K.-I.
e-Rad_Researcher 20344476 著者名 Uemura, T.
e-Rad_Researcher 10322835 著者名 Yamamoto, M.
言語	英語
キーワード	Co-based full-Heusler alloy
	epitaxial growth
	half-metallic ferromagnet
	magnetic tunnel junction
	tunnel magnetoresistance
発行日	2007-06
出版者	IEEE
収録物名	IEEE Transactions on Magnetics
巻(号)	43(6)
ページ	2782-2784
抄録	Fully epitaxial magnetic tunnel junctions (MTJs) of Co2Cr0.6Fe0.4Al (CCFA)/MgO/CCFA with exchange biasing were fabricated. The fabricated MTJs showed clear exchange-biased tunnel magnetoresistance (TMR) characteristics due to the CCFA/Ru/Co90Fe10/IrMn exchange-biased synthetic ferrimagnetic layer. The TMR characteristics were investigated as a function of in situ annealing temperature (Ta) for the upper CCFA layer. We obtained TMR ratios of 60% at room temperature (RT) and 238% at 4.2 K for MTJs with Ta of 400 degC, while those for MTJs with Ta of RT (i.e., having an as-deposited upper CCFA layer) were 17% at RT and 80% at 4.2 K. These results clearly suggest that the spin polarization of the as-deposited upper CCFA layer was significantly increased by in situ annealing.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. IEEE, IEEE TRANSACTIONS ON MAGNETICS, 43, 6, 2007, 2782-2784.
PISSN	0018-9464
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1109/TMAG.2007.893698