Enhancement of thermal spin signal and suppression of anomalous Nernst effect in the CoFeAl/Cu/CoFeAl lateral spin valve

G. Uematsu, T. Nomura, S. Hu, M. Hidegara, Takashi Kimura

研究成果: 著書/レポートタイプへの貢献会議での発言

抄録

Generation of large spin current is an important issue in the operation of spintronic devices because the spin current plays a key role in spin-dependent transports and spin-transfer switching. Recently, a heat flow across a ferromagnet (FM) / nonmagnet (NM) junction is found to be able to generate and propagate the spin current. We have found that the large spin current is efficiently produced by using a heat flow across the CoFeAl /Cu junction because of the relatively large spin-dependent Seebeck coefficient for CoFeAl. The generated spin current is, in general, detected as the electrical voltage by using another ferromagnetic electrode. Using the nonlocal electrical detection scheme, one can prevent the background signal due to the spin-independent charge current. However, in the case of the thermal spin injection, the heat current reaches at the nonlocal ferromagnetic electrode and produces classical thermoelectric effects such as anomalous Nernst effect. Such spurious signals becomes serious obstacle when the large spin current is generated by the thermal spin injection. Therefore, the optimization of the device structure is indispensable for the ideal generation of the spin current using the heat. Here, we explore better geometry for generating the thermally excited spin signal in a laterally configured FM/NM hybrid nanostructure.

元の言語英語
ホスト出版物のタイトル2015 IEEE International Magnetics Conference, INTERMAG 2015
出版者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781479973224
DOI
出版物ステータス出版済み - 1 1 2015
イベント2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, 中国
継続期間: 5 11 20155 15 2015

その他

その他2015 IEEE International Magnetics Conference, INTERMAG 2015
中国
Beijing
期間5/11/155/15/15

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Thermoelectricity
Heat transfer
Magnetoelectronics
Electrodes
Seebeck coefficient
Nanostructures
Geometry
Hot Temperature
Electric potential

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

これを引用

Uematsu, G., Nomura, T., Hu, S., Hidegara, M., & Kimura, T. (2015). Enhancement of thermal spin signal and suppression of anomalous Nernst effect in the CoFeAl/Cu/CoFeAl lateral spin valve. : 2015 IEEE International Magnetics Conference, INTERMAG 2015 [7157183] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2015.7157183

Enhancement of thermal spin signal and suppression of anomalous Nernst effect in the CoFeAl/Cu/CoFeAl lateral spin valve. / Uematsu, G.; Nomura, T.; Hu, S.; Hidegara, M.; Kimura, Takashi.

2015 IEEE International Magnetics Conference, INTERMAG 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7157183.

研究成果: 著書/レポートタイプへの貢献会議での発言

Uematsu, G, Nomura, T, Hu, S, Hidegara, M & Kimura, T 2015, Enhancement of thermal spin signal and suppression of anomalous Nernst effect in the CoFeAl/Cu/CoFeAl lateral spin valve. : 2015 IEEE International Magnetics Conference, INTERMAG 2015., 7157183, Institute of Electrical and Electronics Engineers Inc., 2015 IEEE International Magnetics Conference, INTERMAG 2015, Beijing, 中国, 5/11/15. https://doi.org/10.1109/INTMAG.2015.7157183
Uematsu G, Nomura T, Hu S, Hidegara M, Kimura T. Enhancement of thermal spin signal and suppression of anomalous Nernst effect in the CoFeAl/Cu/CoFeAl lateral spin valve. : 2015 IEEE International Magnetics Conference, INTERMAG 2015. Institute of Electrical and Electronics Engineers Inc. 2015. 7157183 https://doi.org/10.1109/INTMAG.2015.7157183
Uematsu, G. ; Nomura, T. ; Hu, S. ; Hidegara, M. ; Kimura, Takashi. / Enhancement of thermal spin signal and suppression of anomalous Nernst effect in the CoFeAl/Cu/CoFeAl lateral spin valve. 2015 IEEE International Magnetics Conference, INTERMAG 2015. Institute of Electrical and Electronics Engineers Inc., 2015.
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