Electric-field-induced on-off switching of anomalous Ettingshausen effect in ultrathin Co films

We have investigated the electric field effect on magneto-thermoelectric conversion in ultrathin Co films with a naturally-oxidized surface and a solid-state capacitor structure. By means of the thermoelectric imaging technique based on the lock-in thermography, we demonstrate the reversible on-off...

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Bibliographic Details
Published in:Applied physics express 2019-12, Vol.12 (12), p.123003
Main Authors: Nakayama, Hiroyasu, Hirai, Takamasa, Uzuhashi, Jun, Iguchi, Ryo, Ohkubo, Tadakatsu, Koyama, Tomohiro, Chiba, Daichi, Uchida, Ken-ichi
Format: Article
Language:English
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Summary:We have investigated the electric field effect on magneto-thermoelectric conversion in ultrathin Co films with a naturally-oxidized surface and a solid-state capacitor structure. By means of the thermoelectric imaging technique based on the lock-in thermography, we demonstrate the reversible on-off switching of heat currents generated by the anomalous Ettingshausen effect in response to the electric-field-induced magnetic phase transition in the Co films. The electric-field-induced switching property is found to be tuned by changing the Co thickness. Our finding will provide a method for reconfigurable and pin-point switching of thermoelectric conversion properties in spin-caloritronic devices.
ISSN:1882-0778
1882-0786
DOI:10.7567/1882-0786/ab55bb