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説明:

Thermal imaging technology has significantly advanced the fields of thermal engineering and fundamental physics by providing precise and non-contact temperature measurements. In the field of spin caloritronics, an active infrared emission microscopy based on the lock-in thermography (LIT) has greatly developed thermoelectric and thermal transport physics in magnetic materials and their hybrid structures, but measurements have been limited to at or above room temperature. Here, we report on the measurements of transverse thermoelectric conversion in a magnetic material, the anomalous Ettingshausen effect (AEE), below room temperature using the LIT technique. Although the infrared emission decreases with decreasing temperature, LIT with the high temperature resolution allows to observe the AEE-induced temperature modulation in a ferromagnetic Heusler alloy Co2MnGa slab down to 200 K and reliably quantify the anomalous Nernst coefficient down to around 240 K. The methodology demonstrated in this work will pave the way for further developments in both fundamental research and practical applications in spin caloritronics.

権利情報:

• In Copyright
  

  This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Takumi Imamura, Takamasa Hirai, Weinan Zhou, Yuya Sakuraba, Ken-ichi Uchida; Thermal imaging of anomalous Ettingshausen effect at low temperatures using infrared lock-in thermography. Appl. Phys. Lett. 8 September 2025; 127 (10): 102401 and may be found at https://doi.org/10.1063/5.0279908.

キーワード: Lock-in thermography, Infrared imaging, Thermoelectric conversion, Anomalous Ettingshausen effect, Heusler alloy

刊行年月日: 2025-09-08

出版者: American Institute of Physics

掲載誌:

• APPLIED PHYSICS LETTERS (ISSN: 00036951) vol. 127 issue. 10

研究助成金:

• JST JPMJER2201

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5755

公開URL: https://doi.org/10.1063/5.0279908

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更新時刻: 2025-09-11 16:30:21 +0900

MDRでの公開時刻: 2025-09-11 16:20:18 +0900