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Spin Hall voltages from a.c. and d.c. spin currents

Author

Listed:
  • Dahai Wei

    (Institut für Experimentelle und Angewandte Physik, Universität Regensburg)

  • Martin Obstbaum

    (Institut für Experimentelle und Angewandte Physik, Universität Regensburg)

  • Mirko Ribow

    (Institut für Experimentelle und Angewandte Physik, Universität Regensburg
    Institut für Physik, Martin-Luther-Universität Halle)

  • Christian H. Back

    (Institut für Experimentelle und Angewandte Physik, Universität Regensburg)

  • Georg Woltersdorf

    (Institut für Experimentelle und Angewandte Physik, Universität Regensburg
    Institut für Physik, Martin-Luther-Universität Halle)

Abstract

In spin electronics, the spin degree of freedom is used to transmit and store information. To this end the ability to create pure spin currents—that is, without net charge transfer—is essential. When the magnetization vector in a ferromagnet–normal metal junction is excited, the spin pumping effect leads to the injection of pure spin currents into the normal metal. The polarization of this spin current is time-dependent and contains a very small d.c. component. Here we show that the large a.c. component of the spin currents can be detected efficiently using the inverse spin Hall effect. The observed a.c.-inverse spin Hall voltages are one order of magnitude larger than the conventional d.c.-inverse spin Hall voltages measured on the same device. Our results demonstrate that ferromagnet–normal metal junctions are efficient sources of pure spin currents in the gigahertz frequency range.

Suggested Citation

  • Dahai Wei & Martin Obstbaum & Mirko Ribow & Christian H. Back & Georg Woltersdorf, 2014. "Spin Hall voltages from a.c. and d.c. spin currents," Nature Communications, Nature, vol. 5(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4768
    DOI: 10.1038/ncomms4768
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    Cited by:

    1. Hongjun Xu & Ke Jia & Yuan Huang & Fanqi Meng & Qinghua Zhang & Yu Zhang & Chen Cheng & Guibin Lan & Jing Dong & Jinwu Wei & Jiafeng Feng & Congli He & Zhe Yuan & Mingliang Zhu & Wenqing He & Caihua W, 2023. "Electrical detection of spin pumping in van der Waals ferromagnetic Cr2Ge2Te6 with low magnetic damping," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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