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Description:

Wepropose and demonstrate a quantitative noncontact measurement method for the thermal Hall effect (THE) based on magnetic-field-modulated lock-in thermography (LIT). This method enables visualization of THE-induced temperature change and quantitative estimation of the thermal Hall angle θTHE by applying periodic magnetic fields to a sample and obtaining the first-harmonic response of thermal images. By combining this method with LIT-based measurement techniques for the longitudinal thermal conductivity κxx, we also quantify the transverse thermal conductivity κxy. We validate our measurement methods by estimating θTHE, κxx,and κxy in a ferromagnetic Heusler alloy Co2MnGa slab showing large THE.

Rights:

• In Copyright
  

  © 2025 American Physical Society

Keyword: Lock-in thermography, Thermal Hall effect, Thermal conductivity, Topological magnet

Date published: 2025-02-06

Publisher: American Physical Society

Journal:

• Physical Review Applied (ISSN: 23317019) vol. 23 issue. 2 024018

Funding:

• JST JPMJER2201 (ERATO)
• JSPS 22H04965 (科研費　基盤研究S)
• JSPS 22K20495 (科研費　研究活動スタート支援)
• NEC

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5324

First published URL: https://doi.org/10.1103/PhysRevApplied.23.024018

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Updated at: 2025-02-13 16:30:10 +0900

Published on MDR: 2025-02-13 16:30:11 +0900