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Electrical injection of spin-polarized electrons and electrical detection of dynamic nuclear polarization using a Heusler alloy spin source

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/53085

Title: Electrical injection of spin-polarized electrons and electrical detection of dynamic nuclear polarization using a Heusler alloy spin source
Authors: Akiho, Takafumi Browse this author
Shan, Jinhai Browse this author
Liu, Hong-xi Browse this author
Matsuda, Ken-ichi Browse this author
Yamamoto, Masafumi Browse this author
Uemura, Tetsuya Browse this author →KAKEN DB
Issue Date: 17-Jun-2013
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 87
Issue: 23
Publisher DOI: 10.1103/PhysRevB.87.235205
Abstract: We demonstrated electrical spin injection from a half-metallic Heusler alloy Co2MnSi electrode into a GaAs channel through observation of a spin-valve signal and a Hanle signal in the four-terminal nonlocal geometry. Furthermore, we electrically detected a nuclear field acting on electron spins, which was produced by the dynamic nuclear polarization, through observation of transient oblique Hanle signals. Samples with a Co2MnSi spin source exhibited higher spin-injection efficiency and a larger nuclear field compared to samples with a Co50Fe50 spin source, suggesting that the spin polarization of Co2MnSi is higher. This higher polarization is promising for realizing future spintronic devices and for understanding spin interactions as well as spin-dependent transport properties in a semiconductor channel.
Rights: ©2013 American Physical Society
Type: article
URI: http://hdl.handle.net/2115/53085
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: 植村 哲也

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