Magnetothermoelectric figure of merit of Co/Cu multilayers

作者：Hu X K^*; Krzysteczko P; Liebing N; Serrano Guisan S; Rott K; Reiss G; Kimling J; Boehnert T; Nielsch K; Schumacher H W

来源：Applied Physics Letters, 2014, 104(9): 092411.

DOI：10.1063/1.4867700

The switching of the magnetic configuration of giant magnetoresistance multilayers not only changes the electrical and thermal conductivities but also the thermopower. We study the magnetotransport and the magnetothermoelectric properties of Co/Cu multilayer devices in a lateral thermal gradient. The Seebeck coefficient reaches values up to -18 mu V/K at room temperature and shows a magnetic field dependence up to 28.6% upon spin reversal. In combination with thermal conductivity data of the same Co/Cu stack, we find a magnetothermoelectric figure of merit of up to 65%. Furthermore, a magneto-power factor of up to 110% is derived.

• 出版日期2014-3-3