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Direct measurement of electrocaloric effect based on multi-harmonic lock-in thermography
Ryo Iguchi, Daisuke Fukuda, Jun Kano +2
In this study, we report on a direct measurement method for the electrocaloric effect, the heating/cooling upon application/removal of an electric field in dielectric materials, ba…
Thermoelectrics: from Longitudinal to Transverse
Ken-ichi Uchida, Joseph P. Heremans
In this article, we show fundamentals and recent advances on the transverse thermoelectric generation, in which a thermopower is generated in the direction perpendicular to an appl…
Nonlocal Drag Thermoelectricity Generated by Ferroelectric Heterostructures
Ping Tang, Ken-ichi Uchida, Gerrit E. W. Bauer
The \textquotedblleft ferron\textquotedblright\ excitations of the electric-dipolar order carry energy as well as electric dipoles. Here we predict a nonlocal ferron drag effect in…
Anomalous Ettingshausen effect in iron-carbon alloys
Ren Nagasawa, Koichi Oyanagi, Takamasa Hirai +3
We have investigated the anomalous Ettingshausen effect (AEE) in iron-carbon alloys, i.e., cast irons and steel, using the lock-in thermography. All the alloys exhibit the clear AE…
Spin Peltier effect and its length scale in Pt/YIG system at high temperatures
Atsushi Takahagi, Takamasa Hirai, Ryo Iguchi +3
The temperature and yttrium-iron-garnet (YIG) thickness dependences of the spin Peltier effect (SPE) have been investigated using a Pt/YIG junction system at temperatures ranging f…
Excitations of the ferroelectric order
Ping Tang, Ryo Iguchi, Ken-ichi Uchida +1
We identify the bosonic excitations in ferroelectrics that carry electric dipoles from the phenomenological Landau-Ginzburg-Devonshire theory. The "ferron" quasi-particles emerge f…