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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Published inApplied physics express Vol. 12; no. 12; pp. 123003 - 123007
Main Authors Nakayama, Hiroyasu, Hirai, Takamasa, Uzuhashi, Jun, Iguchi, Ryo, Ohkubo, Tadakatsu, Koyama, Tomohiro, Chiba, Daichi, Uchida, Ken-ichi
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.12.2019
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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.
Bibliography:APEX-103012.R1
ISSN:1882-0778
1882-0786
DOI:10.7567/1882-0786/ab55bb