ホーム > 研究活動 > 2019年 > Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets

研究活動

Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets

Appl. Phys. Lett. 115, 222403 (2019)

2019年11月26日(火)

Asuka Miura,Hossein Sepehri-Amin,Keisuke Masuda,Hiroki Tsuchiura(Tohoku University), Yoshio Miura,Ryo Iguchi,Yuya Sakuraba,Junichiro Shiomi,Kazuhiro Hono,and Ken-ichi Uchida

Abstract

This study focuses on the potential of permanent magnets as thermoelectric converters. It is found that a SmCo5-type magnet exhibits a large anomalous Ettingshausen effect (AEE) at room temperature and that its charge-to-heat current conversion coefficient is more than one order of magnitude greater than that of typical ferromagnetic metals. The large AEE is an exclusive feature of the SmCo5-type magnet among various permanent magnets in practical use, which is independent of the conventional performance of magnets based on static magnetic properties. The experimental results show that the large AEE originates from the intrinsic transverse thermoelectric conductivity of SmCo5. This finding makes a connection between permanent magnets and thermal energy engineering, providing the basis for creating “thermoelectric permanent magnets.”



研究活動

文部科学省

文部科学省
元素戦略プロジェクト(活動紹介)
NIMS磁石パートナーシップ

元素戦略拠点

触媒・電池元素戦略拠点
触媒・電池元素戦略研究拠点 (京都大学)
東工大元素戦略拠点
東工大元素戦略拠点 (東京工業大学)
構造材料元素戦略研究拠点
構造材料元素戦略研究拠点 (京都大学)
高効率モーター用磁性材料技術研究組合
高効率モーター用 磁性材料技術研究組合