1. Robust giant anomalous Nernst effect in polycrystalline nodal web ferromagnets.
- Author
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Wang, Yangming, Sakai, Akito, Minami, Susumu, Gu, Hao, Chen, Taishi, Feng, Zili, Nishio-Hamane, Daisuke, and Nakatsuji, Satoru
- Subjects
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NERNST effect , *THERMOELECTRIC effects , *ELECTRONIC band structure , *GALLIUM , *FERROMAGNETIC materials - Abstract
The transverse thermoelectric effect based on the anomalous Nernst effect (ANE) has attracted attention, especially for thermoelectric and spintronic applications. Fe 3 X (X = Ga, Al) is known to exhibit a large ANE at room temperature owing to the topological electronic band structure so-called nodal web. Here, we systematically investigate ANE in the polycrystalline Fe3Ga1−xAlx and Fe3Al1−xSix. Despite significant chemical substitutions, a very robust feature of the large ANE − S y x ∼ 5.7 μ V/K is found for Fe3Ga1−xAlx (0 ≲ x ≲ 0.6), exhibiting a striking x independent nodal web contribution. Since aluminum is more low-cost and abundant than gallium, our results indicate Fe3Ga1−xAlx (x ∼ 0.6) should be suitable for large-scale thermoelectric applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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