Electric-field-induced on–off switching of anomalous Ettingshausen effect in ultrathin Co films. (20th November 2019)

• Record Type: Journal Article
• Authors: Nakayama, Hiroyasu; Hirai, Takamasa; Uzuhashi, Jun; Iguchi, Ryo; Ohkubo, Tadakatsu; Koyama, Tomohiro; Chiba, Daichi; Uchida, Ken-ichi
• Is Part Of: Applied physics express. Volume 12:Number 12(2019)
• Publication Date: 2019-11-20
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab55bb
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: 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.