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Room temperature and low-field resonant enhancement of spin Seebeck effect in partially compensated magnets

Author

Listed:
  • R. Ramos

    (Tohoku University)

  • T. Hioki

    (Institute for Materials Research, Tohoku University)

  • Y. Hashimoto

    (Tohoku University)

  • T. Kikkawa

    (Tohoku University
    Institute for Materials Research, Tohoku University)

  • P. Frey

    (Technische Universität Kaiserslautern)

  • A. J. E. Kreil

    (Technische Universität Kaiserslautern)

  • V. I. Vasyuchka

    (Technische Universität Kaiserslautern)

  • A. A. Serga

    (Technische Universität Kaiserslautern)

  • B. Hillebrands

    (Technische Universität Kaiserslautern)

  • E. Saitoh

    (Tohoku University
    Institute for Materials Research, Tohoku University
    The University of Tokyo
    Tohoku University)

Abstract

Resonant enhancement of spin Seebeck effect (SSE) due to phonons was recently discovered in Y$${}_{3}$$3Fe$${}_{5}$$5O$${}_{12}$$12 (YIG). This effect is explained by hybridization between the magnon and phonon dispersions. However, this effect was observed at low temperatures and high magnetic fields, limiting the scope for applications. Here we report observation of phonon-resonant enhancement of SSE at room temperature and low magnetic field. We observe in Lu$${}_{2}$$2BiFe$${}_{4}$$4GaO$${}_{12}$$12 an enhancement 700% greater than that in a YIG film and at very low magnetic fields around 10$${}^{-1}$$−1 T, almost one order of magnitude lower than that of YIG. The result can be explained by the change in the magnon dispersion induced by magnetic compensation due to the presence of non-magnetic ion substitutions. Our study provides a way to tune the magnon response in a crystal by chemical doping, with potential applications for spintronic devices.

Suggested Citation

  • R. Ramos & T. Hioki & Y. Hashimoto & T. Kikkawa & P. Frey & A. J. E. Kreil & V. I. Vasyuchka & A. A. Serga & B. Hillebrands & E. Saitoh, 2019. "Room temperature and low-field resonant enhancement of spin Seebeck effect in partially compensated magnets," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13121-5
    DOI: 10.1038/s41467-019-13121-5
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    Cited by:

    1. Petros Andreas Pantazopoulos & Johannes Feist & Francisco J. García-Vidal & Akashdeep Kamra, 2024. "Unconventional magnetism mediated by spin-phonon-photon coupling," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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