Giant and Robust Anomalous Nernst Effect in a Polycrystalline Topological Ferromagnet at Room Temperature

Recent discoveries of the topological magnets have opened a new path for developing a much simpler thermoelectric conversion module using the anomalous Nernst effect (ANE). To accelerate such innovation, it is essential to design materials suitable for industrial processes, and thus a high‐ANE polyc...

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Bibliographic Details
Published in:Advanced functional materials 2022-12, Vol.32 (49), p.n/a
Main Authors: Feng, Zili, Minami, Susumu, Akamatsu, Shuhei, Sakai, Akito, Chen, Taishi, Nishio‐Hamane, Daisuke, Nakatsuji, Satoru
Format: Article
Language:English
Subjects:
Electronic structure
Ferromagnetism
ferromagnets
Hall effect
Magnets
Materials science
Nernst effect
Nernst-Ettingshausen effect
nodal lines
polycrystalline alloys
Polycrystals
Robustness
Room temperature
Single crystals
thermoelectrics
Thermopiles
Topology
Transport properties
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Summary:Recent discoveries of the topological magnets have opened a new path for developing a much simpler thermoelectric conversion module using the anomalous Nernst effect (ANE). To accelerate such innovation, it is essential to design materials suitable for industrial processes, and thus a high‐ANE polycrystalline material has been highly desired. Recently, the giant room‐temperature ANE has been reported in single crystals of the topological ferromagnet Fe3Ga. Owning to its cubic structure, the anomalous Hall effect and ANE are isotropic. These properties potentially allow to employ a polycrystalline form of the material to design an ANE‐based thermopile. Here, a giant and robust room‐temperature ANE in the polycrystalline FexGa4−x (2.96 
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202206519