Heat flux sensing by anomalous Nernst effect in Fe-Al thin films on a flexible substrate

W. Zhou; Y. Sakuraba

doi:10.35848/1882-0786/ab79fe

Heat flux sensing by anomalous Nernst effect in Fe-Al thin films on a flexible substrate

Materials Science 2020-03-11 v1

Authors: W. Zhou , Y. Sakuraba

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Abstract

We performed a numerical analysis of the material parameters required for realizing a heat flux sensor exploiting the anomalous Nernst effect (ANE). The results showed the importance of high thermopower of ANE ( $S_{\text{ANE}}$ ) and small saturation magnetization. This motivated us to investigate the effect of Al substitution of Fe on ANE and found $S_{\text{ANE}} =$ 3.4 $\mu$ V/K in Fe $_{81}$ Al $_{19}$ because of the dominant intrinsic mechanism. Using this material, we made a prototype ANE-based heat flux sensor on a thin flexible polyimide sheet and demonstrated accurate sensing with it. This study gives important information for enhancing sensor sensitivity.

Keywords

anomalous Nernst effect heat flux sensor Fe-Al thin film flexible substrate thermopower saturation magnetization sensor sensitivity

Cite

@article{arxiv.2003.01459,
  title  = {Heat flux sensing by anomalous Nernst effect in Fe-Al thin films on a flexible substrate},
  author = {W. Zhou and Y. Sakuraba},
  journal= {arXiv preprint arXiv:2003.01459},
  year   = {2020}
}

Comments

11 pages, 4 figures

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