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Hybridizing anomalous Nernst effect in artificially tilted multilayer based on magnetic topological material

Author

Listed:
  • Takamasa Hirai

    (National Institute for Materials Science)

  • Fuyuki Ando

    (National Institute for Materials Science)

  • Hossein Sepehri-Amin

    (National Institute for Materials Science)

  • Ken-ichi Uchida

    (National Institute for Materials Science
    The University of Tokyo)

Abstract

Transverse thermoelectric conversion holds significant potential in addressing complex challenges faced by classical Seebeck/Peltier modules. A promising transverse thermoelectric phenomenon is the anomalous Nernst effect originating from nontrivial band structures in magnetic topological materials. However, the currently reported performance of the anomalous Nernst effect in topological materials, e.g., Co2MnGa, remains insufficient for practical thermoelectric applications. Here, we unveil an unconventional availability of the anomalous Nernst effect by integrating magnetic topological materials into artificially tilted multilayers, known to exhibit the structure-induced transverse thermoelectric conversion due to the off-diagonal Seebeck effect. Our experiments reveal that the transverse thermoelectric performance in Co2MnGa-based artificially tilted multilayers is improved through the hybrid action of the anomalous Nernst and off-diagonal Seebeck effects, with the magnetization-dependent performance modulation being one order of magnitude greater than the performance achievable with the anomalous Nernst effect alone. This synergy underscores the importance of hybrid transverse thermoelectric conversion and paves a way for advancing thermoelectric applications using magnetic materials.

Suggested Citation

  • Takamasa Hirai & Fuyuki Ando & Hossein Sepehri-Amin & Ken-ichi Uchida, 2024. "Hybridizing anomalous Nernst effect in artificially tilted multilayer based on magnetic topological material," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53723-2
    DOI: 10.1038/s41467-024-53723-2
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    References listed on IDEAS

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    1. Ken-ichi Uchida & Shunsuke Daimon & Ryo Iguchi & Eiji Saitoh, 2018. "Publisher Correction: Observation of anisotropic magneto-Peltier effect in nickel," Nature, Nature, vol. 560(7720), pages 36-36, August.
    2. Ken-ichi Uchida & Shunsuke Daimon & Ryo Iguchi & Eiji Saitoh, 2018. "Observation of anisotropic magneto-Peltier effect in nickel," Nature, Nature, vol. 558(7708), pages 95-99, June.
    3. Shunsuke Daimon & Ryo Iguchi & Tomosato Hioki & Eiji Saitoh & Ken-ichi Uchida, 2016. "Thermal imaging of spin Peltier effect," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
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