Large Room Temperature Anomalous Transverse Thermoelectric Effect in Kagome Antiferromagnet YMn6Sn6

Roychowdhury S, Ochs AM, Guin SN, Samanta K, Noky J, Shekhar C, Vergniory MG, Goldberger JE, Felser C (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Advanced Materials Wiley

Book Volume: 34

Article Number: 2201350

Journal Issue: 40

DOI: 10.1002/adma.202201350

Abstract

Kagome magnets possess several novel nontrivial topological features owing to the strong correlation between topology and magnetism that extends to their applications in the field of thermoelectricity. Conventional thermoelectric (TE) devices use the Seebeck effect to convert heat into electrical energy. In contrast, transverse thermoelectric devices based on the Nernst effect are attracting recent attention due to their unique transverse geometry, which uses a single material to eliminate the need for a multitude of electrical connections compared to conventional TE devices. Here, a large anomalous transverse thermoelectric effect of ≈2 µV K−1 at room temperature in a kagome antiferromagnet YMn6Sn6 single crystal is obtained. The obtained value is larger than that of state-of-the-art canted antiferromagnetic (AFM) materials and comparable with ferromagnetic systems. The large anomalous Nernst effect (ANE) can be attributed to the net Berry curvature near the Fermi level. Furthermore, the ANE of the AFM YMn6Sn6 exceeds the magnetization scaling relationship of conventional ferromagnets. The results clearly illustrate that AFM material YMn6Sn6 is an ideal topological material for room-temperature transverse thermoelectric applications.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Birla Institute of Technology and Science (BITS) IN India (IN) Donostia International Physics Center (DIPC) ES Spain (ES) Ohio State University US United States (USA) (US)

How to cite

APA:

Roychowdhury, S., Ochs, A.M., Guin, S.N., Samanta, K., Noky, J., Shekhar, C.,... Felser, C. (2022). Large Room Temperature Anomalous Transverse Thermoelectric Effect in Kagome Antiferromagnet YMn6Sn6. Advanced Materials, 34(40). https://doi.org/10.1002/adma.202201350

MLA:

Roychowdhury, Subhajit, et al. "Large Room Temperature Anomalous Transverse Thermoelectric Effect in Kagome Antiferromagnet YMn6Sn6." Advanced Materials 34.40 (2022).

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