Giant tunneling magnetoresistance in epitaxial Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions by half-metallicity of Co2MnSi and coherent tunneling

Liu, Hong-xi; Honda, Yusuke; Taira, Tomoyuki; Matsuda, Ken-ichi; Arita, Masashi; Uemura, Tetsuya; Yamamoto, Masafumi

Giant tunneling magnetoresistance in epitaxial Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions by half-metallicity of Co2MnSi and coherent tunneling

Liu, Hong-xi; Honda, Yusuke; Taira, Tomoyuki et al.

Applied Physics Letters, 2012, 101(13), 132418

Permalink : https://hdl.handle.net/2115/50424

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アクセス権	open access
URI	https://hdl.handle.net/2115/50424
タイトル	Giant tunneling magnetoresistance in epitaxial Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions by half-metallicity of Co2MnSi and coherent tunneling
著者	Liu, Hong-xi ; Honda, Yusuke ; Taira, Tomoyuki ; Matsuda, Ken-ichi ; Arita, Masashi ; Uemura, Tetsuya ; Yamamoto, Masafumi
著者名 Liu, Hong-xi
著者名 Honda, Yusuke
著者名 Taira, Tomoyuki
e-Rad_Researcher 80360931 著者名 Matsuda, Ken-ichi
e-Rad_Researcher 20222755 著者名 Arita, Masashi
e-Rad_Researcher 20344476 著者名 Uemura, Tetsuya
e-Rad_Researcher 10322835 著者名 Yamamoto, Masafumi
言語	英語
キーワード	buffer layers
	cobalt alloys
	dislocations
	giant magnetoresistance
	magnesium compounds
	magnetic multilayers
	manganese alloys
	metallic epitaxial layers
	silicon alloys
	tunnelling magnetoresistance
発行日	2012-09-24
出版者	American Institute of Physics
収録物名	Applied Physics Letters
巻(号)	101(13)
ページ	132418
抄録	Giant tunnel magnetoresistance (TMR) ratios of up to 1995% at 4.2K and up to 354% at 290K were obtained for epitaxial Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions (MTJs) featuring a reduced lattice mismatch in the MTJ trilayer by introducing a thin Co2MnSi lower electrode deposited on a Co50Fe50 buffer layer. The obtained giant TMR ratios can be explained by the enhanced contribution of coherent tunneling originating from the increased misfit dislocation spacing at the lower and upper interfaces with a MgO barrier along with the half-metallicity of Co2MnSi electrodes.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright 2012 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. 101, 132418 (2012) and may be found at https://dx.doi.org/10.1063/1.4755773
PISSN	0003-6951
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1063/1.4755773