Uchida Ken-Ichi, Murata Masayuki, Miura Asuka, Iguchi Ryo
National Institute for Materials Science, Tsukuba 305-0047, Japan.
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
Phys Rev Lett. 2020 Sep 4;125(10):106601. doi: 10.1103/PhysRevLett.125.106601.
We report the observation of the higher-order thermoelectric conversion based on a magneto-Thomson effect. By means of thermoelectric imaging techniques, we directly observed the temperature change induced by the Thomson effect in a polycrystalline Bi_{88}Sb_{12} alloy under a magnetic field and found that the magnetically enhanced Thomson coefficient can be comparable to or even larger than the Seebeck coefficient. Our experiments reveal the significant contribution of the higher-order magnetothermoelectric conversion, opening the door to "nonlinear spin caloritronics."
