Critical effect of spin-dependent transport in a tunnel barrier on enhanced Hanle-type signals observed in three-terminal geometry

Uemura, Tetsuya; Kondo, Kenji; Fujisawa, Jun; Matsuda, Ken-ichi; Yamamoto, Masafumi

Critical effect of spin-dependent transport in a tunnel barrier on enhanced Hanle-type signals observed in three-terminal geometry

Uemura, Tetsuya; Kondo, Kenji; Fujisawa, Jun et al.

Applied Physics Letters, 2012, 101(13), 132411

Permalink : https://hdl.handle.net/2115/50420

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アクセス権	open access
URI	https://hdl.handle.net/2115/50420
タイトル	Critical effect of spin-dependent transport in a tunnel barrier on enhanced Hanle-type signals observed in three-terminal geometry
著者	Uemura, Tetsuya ; Kondo, Kenji ; Fujisawa, Jun ; Matsuda, Ken-ichi ; Yamamoto, Masafumi
e-Rad_Researcher 20344476 著者名 Uemura, Tetsuya
e-Rad_Researcher 50360946 著者名 Kondo, Kenji
著者名 Fujisawa, Jun
e-Rad_Researcher 80360931 著者名 Matsuda, Ken-ichi
e-Rad_Researcher 10322835 著者名 Yamamoto, Masafumi
言語	英語
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	132411
抄録	The MgO thickness dependence of Hanle signals in Co50Fe50/MgO/n-Si tunnel junctions was investigated using a three-terminal geometry. The observed Hanle signal is several orders of magnitude stronger than the predicted value by conventional theory as reported in many literatures. Furthermore, the magnitude of the spin signal depends on the junction resistance rather than the channel resistance, implying that the largest part of the observed Hanle signal is not caused by spin accumulation in the semiconductor region. A possible origin of the observed strong Hanle signal is due to a modulation of the tunneling resistance by a magnetic field, which is induced by the spin precession in localized states formed in the vicinity of the Co50Fe50/MgO interface.
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, 132411 (2012) and may be found at https://dx.doi.org/10.1063/1.4754545
PISSN	0003-6951
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1063/1.4754545