Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials
Weinan Zhou, Asuka Miura, Takamasa Hirai, Yuya Sakuraba, Ken‐ichi Uchida
Abstract
Seebeck-driven transverse thermoelectric generation in magnetic/thermoelectric hybrid materials (STTG) has been investigated in all-bulk hybrid materials. Transverse thermopower in a ferromagnetic Co2MnGa/thermoelectric n-type Si hybrid bulk material with adjusted dimensions reaches 16.0 μV/K at room temperature with the aid of the STTG contribution, which is much larger than the anomalous Nernst coefficient of the Co2MnGa slab (6.8 μV/K). Although this transverse thermopower is smaller than the value for previously reported thin-film-based hybrid materials, hybrid bulk materials exhibit much larger electrical power owing to their small internal resistance. This demonstration confirms the validity of STTG in bulk materials and clarifies its potential as a thermal energy harvester.