Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866917915982299136 |
|---|---|
| author | Imamura, Takumi Hirai, Takamasa Oyanagi, Koichi Iguchi, Ryo Takamori, Kenta Kobayashi, Satoru Uchida, Ken-ichi |
| author_facet | Imamura, Takumi Hirai, Takamasa Oyanagi, Koichi Iguchi, Ryo Takamori, Kenta Kobayashi, Satoru Uchida, Ken-ichi |
| contents | We propose and demonstrate a quantitative noncontact measurement method for the thermal Hall effect (THE) based on magnetic-field-modulated lock-in thermography. This method enables visualization of THE-induced temperature change and quantitative estimation of the thermal Hall angle $θ_{\rm THE}$ 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 $κ_{xx}$, we also quantify the transverse thermal conductivity $κ_{xy}$. We validate our measurement methods by estimating $θ_{\rm THE}$, $κ_{xx}$, and $κ_{xy}$ in a ferromagnetic Heusler alloy Co$_2$MnGa slab showing large THE. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_10485 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography Imamura, Takumi Hirai, Takamasa Oyanagi, Koichi Iguchi, Ryo Takamori, Kenta Kobayashi, Satoru Uchida, Ken-ichi Mesoscale and Nanoscale Physics Materials Science We propose and demonstrate a quantitative noncontact measurement method for the thermal Hall effect (THE) based on magnetic-field-modulated lock-in thermography. This method enables visualization of THE-induced temperature change and quantitative estimation of the thermal Hall angle $θ_{\rm THE}$ 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 $κ_{xx}$, we also quantify the transverse thermal conductivity $κ_{xy}$. We validate our measurement methods by estimating $θ_{\rm THE}$, $κ_{xx}$, and $κ_{xy}$ in a ferromagnetic Heusler alloy Co$_2$MnGa slab showing large THE. |
| title | Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2501.10485 |