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All-solid-state nanoscale devices capable of efficiently controlling a heat flow are crucial for advanced thermal management technologies. Here we predict a magnon-driven magnetothermal resistance (mMTR) effect in multilayers of ferromagnets and normal metals, i.e. a thermal resistance that varies when switching between parallel and antiparallel magnetization orientations of the ferromagnetic layers, even in the absence of conduction electrons in the ferromagnets. The mMTR arises from an interfacial temperature drop caused by magnon spin accumulations and can be engineered by the layer thicknesses, spin diffusion lengths, and spin conductances. The mMTR predicted here enables magnetothermal switching in insulator-based systems; we already predict large mMTR ratios up to 40% for superlattices of the electrically insulating magnet yttrium iron garnet and elemental metals.

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• In Copyright
  ©2025 American Physical Society

Keyword: Thermal transport, Spintronics, Magnon, Magnetic material

Date published: 2025-05-19

Publisher: American Physical Society (APS)

Journal:

• Physical Review B (ISSN: 24699950) vol. 111 issue. 18 L180407

Funding:

• Japan Society for the Promotion of Science 22H04965
• Japan Society for the Promotion of Science 23K13050
• Japan Society for the Promotion of Science 19H00645
• Japan Society for the Promotion of Science 24H02231
• Exploratory Research for Advanced Technology JPMJER2201

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5527

First published URL: https://doi.org/10.1103/physrevb.111.l180407

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Updated at: 2025-06-09 10:04:56 +0900

Published on MDR: 2025-06-09 12:20:55 +0900