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Hybrid transverse thermoelectric conversion driven by simultaneous action of multiple phenomena offers a promising route for efficient energy conversion. This study demonstrates magnetic-field-free hybrid transverse thermoelectric conversion based on the anomalous Nernst and off-diagonal Seebeck effects in artificially tilted multilayers comprising SmCo5/Bi0.2Sb1.8Te3 junctions, where the remanent magnetization of SmCo5 induces the anomalous Nernst effect in the absence of an external magnetic field. The thermoelectric figure of merit is observed to be 0.299 ± 0.005 at room temperature owing to the additive contribution of the anomalous Nernst effect, indicating that the excellent figure of merit due to the off-diagonal Seebeck effect can further be enhanced by hybridizing the anomalous Nernst effect. These results establish a new approach for high-performance transverse thermoelectric materials, enabling energy harvesting and cooling applications that leverage magnetically controlled thermoelectric effects without requiring an external magnetic field.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: anomalous Nernst effect, artificially tilted multilayer, off-diagonal Seebeck effect, permanent magnet, transverse thermoelectrics

Date published: 2025-06-29

Publisher: Wiley

Journal:

• Annalen der Physik (ISSN: 00033804) vol. 537 issue. 8 e00127

Funding:

• Japan Science and Technology Agency JPMJER2201
• Japan Society for the Promotion of Science 24K17610

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1002/andp.202500127

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Updated at: 2025-08-18 16:30:49 +0900

Published on MDR: 2025-08-18 16:21:28 +0900