Robust giant anomalous Nernst effect in polycrystalline nodal web ferromagnets
The transverse thermoelectric effect based on the anomalous Nernst effect (ANE) has attracted attention, especially for thermoelectric and spintronic applications. Fe3X (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 −Syx∼ 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.
Authors
- Zili Feng (ORCID: https://orcid.org/0000-0001-5148-9000)
- Satoru Nakatsuji (ORCID: https://orcid.org/0000-0001-9134-659X)
- Yangming Wang
- Akito Sakai (ORCID: https://orcid.org/0000-0003-0062-4801)
- Susumu Minami (ORCID: https://orcid.org/0000-0002-2852-3503)
- Hao Gu (ORCID: https://orcid.org/0000-0002-6795-6168)
- Daisuke Nishio‐Hamane (ORCID: https://orcid.org/0009-0007-9530-2130)
- Taishi Chen (ORCID: https://orcid.org/0000-0003-1827-6614)
Institutions
- Canadian Institute for Advanced Research (CA)
- Johns Hopkins University (US)
- Kyoto University (JP)
- Japan Science and Technology Agency (JP)
- The University of Tokyo (JP)
- Southeast University (CN)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2024-08-19
- DOI
- https://doi.org/10.1063/5.0219416
- Citations
- 12
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 4.05
Funders
- New Energy and Industrial Technology Development Organization
- Office of Science
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency
- JST-Mirai Program