High-temperature dependence of anomalous Ettingshausen effect in SmCo$_5$-type permanent magnets

Asuka Miura; Keisuke Masuda; Takamasa Hirai; Ryo Iguchi; Takeshi Seki; Yoshio Miura; Hiroki Tsuchiura; Koki Takanashi; Ken-ichi Uchida

doi:10.1063/5.0023111

High-temperature dependence of anomalous Ettingshausen effect in SmCo$_5$-type permanent magnets

Materials Science 2020-09-01 v2

Authors: Asuka Miura , Keisuke Masuda , Takamasa Hirai , Ryo Iguchi , Takeshi Seki , Yoshio Miura , Hiroki Tsuchiura , Koki Takanashi , Ken-ichi Uchida

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Abstract

The anomalous Ettingshausen effect (AEE) in SmCo $_5$ -type permanent magnets has been investigated in the high-temperature range from room temperature to around 600 K. The anomalous Ettingshausen coefficient of the SmCo $_5$ and (SmGd)Co $_5$ magnets monotonically increases with increasing the temperature and shows the similar temperature dependence, while the coefficient of SmCo $_5$ is slightly larger than that of (SmGd)Co $_5$ at high temperatures. The dimensionless figure of merit for AEE in SmCo $_5$ at high temperatures is much greater than the previous record obtained for the anomalous Nernst effect. The observed high-temperature behavior of AEE is discussed based on the first-principles calculations of transverse transport coefficients.

Keywords

anomalous ettingshausen effect smco5 permanent magnets high-temperature dependence figure of merit first-principles calculations transverse transport

Cite

@article{arxiv.2007.15277,
  title  = {High-temperature dependence of anomalous Ettingshausen effect in SmCo$_5$-type permanent magnets},
  author = {Asuka Miura and Keisuke Masuda and Takamasa Hirai and Ryo Iguchi and Takeshi Seki and Yoshio Miura and Hiroki Tsuchiura and Koki Takanashi and Ken-ichi Uchida},
  journal= {arXiv preprint arXiv:2007.15277},
  year   = {2020}
}

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10 pages, 4 figures

High-temperature dependence of anomalous Ettingshausen effect in SmCo$_5$-type permanent magnets

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