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Large pure spin current generation in metallic nanostructures

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Abstract

Pure spin current corresponds to the flow of spin angular momentum without associating any net charge current, and possesses potential to be incorporated in special functional and high-performance devices based on nonlocal spin injection. To utilize pure spin current in practical devices, it is imperative to increase the spin generation efficiency. In this article we discuss two special configurations of nonlocal devices, known as multi-terminal injector and nanopillar devices, which possess immense potential to overcome the Joule heating problem, the key bottleneck to enhance the pure spin current generation. We also demonstrate magnetization switching of a nanosized ferromagnet due to pure spin current injection in a nanopillar-based nonlocal device.

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Acknowledgements

The authors would like to thank Mr. Nomura and Mr. Nonoguchi for their experimental support. This work is partially supported by the Kurata foundation, NEDO and CREST.

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Authors and Affiliations

  1. Advanced Electronics Research Division, INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan

    Saidur R. Bakaul, Shaojie Hu & Takashi Kimura

  2. Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan

    Shaojie Hu

  3. CREST, Japan Science and Technology Agency, Sanbancho, Tokyo, 102-0075, Japan

    Takashi Kimura

Authors
  1. Saidur R. Bakaul
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  2. Shaojie Hu
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Correspondence to Takashi Kimura.

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Bakaul, S.R., Hu, S. & Kimura, T. Large pure spin current generation in metallic nanostructures. Appl. Phys. A 111, 355–360 (2013). https://doi.org/10.1007/s00339-012-7495-0

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  • DOI: https://doi.org/10.1007/s00339-012-7495-0

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