Seebeck-driven transverse thermoelectric generation in magnetic hybrid bulk materials

Abstract

The Seebeck-driven transverse thermoelectric generation in magnetic/thermoelectric hybrid materials (STTG) has been investigated in all-bulk hybrid materials. The transverse thermopower in a ferromagnetic Co${}_2$MnGa/thermoelectric $n$-type Si hybrid bulk material with the adjusted dimensions reaches 16.0 $\mu$V/K at room temperature with the aid of the STTG contribution, which is much larger than the anomalous Nernst coefficient of the Co${}_2$MnGa slab (6.8 $\mu$V/K). Although this transverse thermopower is smaller than the value for previously reported thin-film-based hybrid materials, the hybrid bulk materials exhibit much larger electrical power owing to their small internal resistance. This demonstration confirms the validity of STTG in bulk materials and clarifies its potential as a thermal energy harvester.

12 pages, 4 figures, 1 table

References in corpus (5)

• Transverse thermoelectric generation using magnetic materials
• Spin-polarized Weyl cones and gigantic anomalous Nernst effect in ferromagnetic Heusler films
• Thermoelectrics: from Longitudinal to Transverse
• Phenomenological analysis of transverse thermoelectric generation and cooling performance in magnetic/thermoelectric hybrid systems
• Seebeck-driven transverse thermoelectric generation in on-chip devices

Cited by in corpus (7)

• Hybridizing anomalous Nernst effect in artificially tilted multilayer based on magnetic topological material
• Fundamentals and advances in transverse thermoelectrics
• Simultaneous achievement of large anomalous Nernst effect and reduced thermal conductivity in sintered polycrystalline topological Heusler ferromagnets
• Direct electrical probing of anomalous Nernst conductivity
• Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography
• Cooperative Nernst Effect of Multilayer Systems: Parallel Circuit Model Study
• Intrinsic Berry Curvature Driven Anomalous Hall and Nernst Effect in Co${}_2$MnSn