Hybridizing anomalous Nernst effect in artificially tilted multilayer based on magnetic topological material

Abstract

Transverse thermoelectric conversion holds significant potential in addressing complex challenges faced by classical Seebeck/Peltier modules. A promising transverse thermoelectric phenomenon is the anomalous Nernst effect (ANE) originating from nontrivial band structures in magnetic topological materials. However, the currently reported performance for ANE in topological materials, e.g., Co${}_2$MnGa, remains insufficient for practical thermoelectric applications. Here, we unveil a new availability for ANE by integrating magnetic topological materials into artificially tilted multilayers (ATMLs), known to exhibit the structure-induced transverse thermoelectric conversion due to the off-diagonal Seebeck effect. Our experiments reveal that the transverse thermoelectric performance in Co${}_2$MnGa-based ATMLs is improved through the hybrid action of ANE and the off-diagonal Seebeck effect, with the modulation of performance dependent on magnetization being significantly greater than the performance achievable with ANE alone. This unconventional synergy underscores the importance of hybrid transverse thermoelectric conversion and paves a way for advancing thermoelectric applications using magnetic materials.

26 pages, 15 figures, 1 table

References in corpus (10)

• Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
• Thermal imaging of spin Peltier effect
• Large anomalous Nernst effect in a van der Waals ferromagnet Fe${}_3$GeTe${}_2$
• Transverse thermoelectric generation using magnetic materials
• Thermoelectrics: from Longitudinal to Transverse
• Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets
• High-temperature dependence of anomalous Ettingshausen effect in SmCo${}_5$-type permanent magnets
• Creation of flexible spin-caloritronic material with giant transverse thermoelectric conversion by nanostructure engineering
• Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect
• Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials

Cited by in corpus (6)

• Fundamentals and advances in transverse thermoelectrics
• Multifunctional composite magnet realizing record-high transverse thermoelectric generation
• Simultaneous achievement of large anomalous Nernst effect and reduced thermal conductivity in sintered polycrystalline topological Heusler ferromagnets
• Non-equilibrium Magnon Engineering Enabling Significant Thermal Transport Modulation
• Quantitative measurements of transverse thermoelectric generation and cooling performances in SmCo${}_5$/Bi${}_{0.2}$Sb${}_{1.8}$Te${}_3$-based artificially tilted multilayer module
• Spin caloritronics: History and future prospects of experiments