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Structural and Thermoelectric Properties of Ternary Full-Heusler Alloys

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Abstract

The thermoelectric properties of ternary full-Heusler alloys, Co2 YZ, which are in a ferromagnetic state up to high temperature above 300 K, were measured and are discussed in terms of the crystal structure and electronic states. Among the full-Heusler alloys studied, the Co2MnSi sample exhibited the highest absolute value of Seebeck coefficient and also the highest electrical conductivity in the temperature range from 300 K to 1023 K. The highest power factor of 2.9 × 10−3 W/m-K2 was obtained for the Co2MnSi sample at 550 K, demonstrating the potential of half-metallic full-Heusler alloys as thermoelectric materials.

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Acknowledgements

This work was partly supported by Grants-in-Aid for Scientific Research (B) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan (Grant No. 25289222).

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  1. Department of Applied Physics, Graduate School of Engineering, Tohoku University, 6-6-05, Aramaki-Aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan

    K. Hayashi, M. Eguchi & Y. Miyazaki

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  1. K. Hayashi
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  2. M. Eguchi
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  3. Y. Miyazaki
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Correspondence to K. Hayashi.

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Hayashi, K., Eguchi, M. & Miyazaki, Y. Structural and Thermoelectric Properties of Ternary Full-Heusler Alloys. J. Electron. Mater. 46, 2710–2716 (2017). https://doi.org/10.1007/s11664-016-4944-0

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