Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials

Weinan Zhou; Asuka Miura; Takamasa Hirai; Yuya Sakuraba; Ken Ichi Uchida

doi:10.1063/5.0126870

Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials

Weinan Zhou, Asuka Miura, Takamasa Hirai, Yuya Sakuraba, Ken Ichi Uchida

Integrated Research Division

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	062402
Journal	Applied Physics Letters
Volume	122
Issue number	6
DOIs	https://doi.org/10.1063/5.0126870
Publication status	Published - 2023 Feb 6

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/5.0126870

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title = "Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials",

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.",

author = "Weinan Zhou and Asuka Miura and Takamasa Hirai and Yuya Sakuraba and Uchida, {Ken Ichi}",

note = "Funding Information: The authors thank K. Suzuki and M. Isomura for technical support. This work was supported by CREST “Creation of Innovative Core Technologies for Nano-enabled Thermal Management” (No. JPMJCR17I1) and ERATO “Magnetic Thermal Management Materials” (No. JPMJER2201) from JST, Japan, Grant-in-Aid for Scientific Research (S) (No. 18H05246) from JSPS KAKENHI, Japan, “Mitou challenge 2050” (No. P14004) from NEDO, Japan, and NEC Corporation. Publisher Copyright: {\textcopyright} 2023 Author(s).",

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doi = "10.1063/5.0126870",

language = "English",

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AU - Zhou, Weinan

AU - Miura, Asuka

AU - Hirai, Takamasa

AU - Sakuraba, Yuya

AU - Uchida, Ken Ichi

N1 - Funding Information: The authors thank K. Suzuki and M. Isomura for technical support. This work was supported by CREST “Creation of Innovative Core Technologies for Nano-enabled Thermal Management” (No. JPMJCR17I1) and ERATO “Magnetic Thermal Management Materials” (No. JPMJER2201) from JST, Japan, Grant-in-Aid for Scientific Research (S) (No. 18H05246) from JSPS KAKENHI, Japan, “Mitou challenge 2050” (No. P14004) from NEDO, Japan, and NEC Corporation. Publisher Copyright: © 2023 Author(s).

PY - 2023/2/6

Y1 - 2023/2/6

N2 - 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.

AB - 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.

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Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials

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