論文 Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography

Takumi Imamura SAMURAI ORCID (Research Center for Magnetic and Spintronic Materials/Spin Caloritronics Group, National Institute for Materials ScienceROR) ; Takamasa Hirai SAMURAI ORCID (Research Center for Magnetic and Spintronic Materials/Spin Caloritronics Group, National Institute for Materials ScienceROR) ; Koichi Oyanagi (Iwate University) ; Ryo Iguchi SAMURAI ORCID (Research Center for Magnetic and Spintronic Materials/Spin Caloritronics Group, National Institute for Materials ScienceROR) ; Kenta Takamori (Iwate University) ; Satoru Kobayashi (Iwate University) ; Ken-ichi Uchida SAMURAI ORCID (Research Center for Magnetic and Spintronic Materials/Spin Caloritronics Group, National Institute for Materials ScienceROR)

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引用
Takumi Imamura, Takamasa Hirai, Koichi Oyanagi, Ryo Iguchi, Kenta Takamori, Satoru Kobayashi, Ken-ichi Uchida. Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography. Physical Review Applied. 2025, 23 (2), 024018. https://doi.org/10.48505/nims.5324

説明:

(abstract)

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.

権利情報:

キーワード: Lock-in thermography, Thermal Hall effect, Thermal conductivity, Topological magnet

刊行年月日: 2025-02-06

出版者: American Physical Society

掲載誌:

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

研究助成金:

  • 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

原稿種別: 著者最終稿 (Accepted manuscript)

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

公開URL: https://doi.org/10.1103/PhysRevApplied.23.024018

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更新時刻: 2025-02-13 16:30:10 +0900

MDRでの公開時刻: 2025-02-13 16:30:11 +0900

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