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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Alloys and Compounds for Thermoelectric and Solar Cell Applications VIII
Presentation Title Utilizing Magnetism and Dilute Magnetic Semiconductors to Enhance Thermoelectric Performance
Author(s) Takao Mori
On-Site Speaker (Planned) Takao Mori
Abstract Scope We have previously proposed to utilize magnetic interactions between carriers and magnetic moments to enhance the thermoelectric (TE) power factor [1,2]. Magnetic interactions can also be created in non-magnetic materials by magnetic-ion doping, e.g. CuGaTe2, BiCuSeO, Bi2Te3, SnTe, etc. [2]. The interaction affects the carriers by making them heavier, like a "drag" effect, enhancing the Seebeck effect. However, unlike magnon drag, TE enhancement via magnetic interaction is not solely dependent on ordering, and is effective at higher temperatures also. We have also demonstrated significant enhancement of the Seebeck coefficient via spin fluctuation. This is indicated to more than double the power factor in a Heusler compound [3]. [1] Appl. Phys. Express, 6, 043001 (2013) , Angew. Chem. 54, 12909 (2015), Chem. Mater., 29, 2988 (2017), Small, 13, 1702013 (2017). [2] J. Mater. Chem. A, 5, 7545 (2017), Materials Today Phys. , 9, 100090 (2019). [3] Science Advances, 5, eaat5935 (2019).
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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Defect Formation Energies and Effective Masses in the Mg2(Si,Sn) Solid Solutions via DFT Calculations
Enhanced Averaged zT in n-type Bi2Te3 via Solubility Control
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