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説明:

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.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: transverse thermoelectric conversion, artificially tilted multilayer, anomalous Nernst effect, off-diagonal Seebeck effect

刊行年月日: 2024-11-14

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 15 issue. 1 9643

研究助成金:

• MEXT | JST | Exploratory Research for Advanced Technology JPMJER2201
• MEXT | Japan Society for the Promotion of Science 22H04965
• NEC Corporation

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41467-024-53723-2

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更新時刻: 2024-11-23 16:30:24 +0900

MDRでの公開時刻: 2024-11-23 16:30:25 +0900