Zero‐Field Hybridization of Anomalous Nernst and Off‐diagonal Seebeck Effects in Artificially Tilted Multilayers

Abstract Hybrid transverse thermoelectric conversion driven by simultaneous action of multiple phenomena offers a promising route for efficient energy conversion. This study demonstrates magnetic‐field‐free hybrid transverse thermoelectric conversion based on the anomalous Nernst and off‐diagonal Seebeck effects in artificially tilted multilayers comprising SmCo 5 /Bi 0.2 Sb 1.8 Te 3 junctions, where the remanent magnetization of SmCo 5 induces the anomalous Nernst effect in the absence of an external magnetic field. The thermoelectric figure of merit is observed to be 0.299 ± 0.005 at room temperature owing to the additive contribution of the anomalous Nernst effect, indicating that the excellent figure of merit due to the off‐diagonal Seebeck effect can further be enhanced by hybridizing the anomalous Nernst effect. These results establish a new approach for high‐performance transverse thermoelectric materials, enabling energy harvesting and cooling applications that leverage magnetically controlled thermoelectric effects without requiring an external magnetic field.