Large anomalous nernst effects in two-dimensional ferromagnet Fe₃GaTe₂

The significant anomalous Nernst effect (ANE) in two-dimensional van der Waals magnetic materials provides potential applications for the design of novel thermoelectric devices and spintronic devices. Fe3GaTe2 is a newly discovered two-dimensional magnetic material, which has a similar structure to Fe3GeTe2 but a higher Curie temperature. In this study, we present the observation of the anomalous Hall effect (AHE) and ANE in Fe3GaTe2. It has an above-room-temperature Curie temperature of about 340K, and a Nernst thermopower of Sxy∼1.2μV/K at 100K, which is much higher than those in ordinary magnets. Most importantly, the bipolarity of the AHE of Fe3GaTe2 holds the potential in thermoelectric and spintronic applications.