Hybridizing multiple transverse thermoelectric effects in a single material synergistically enhances the dimensionless figure of merit for transverse thermoelectric conversion owing to the square-law characteristics of the superimposed transverse thermopowers. Here, we phenomenologically formulate the appearance of transverse magnetothermoelectric phenomena, i.e., the anomalous Nernst effect and Seebeck-driven anomalous Hall effect, in artificially tilted multilayers consisting of magnetic and thermoelectric materials, where the off-diagonal Seebeck effect originally exists due to the anisotropic composite structure. Because the contributions of the anomalous Nernst, Seebeck-driven anomalous Hall, and off-diagonal Seebeck effects to transverse thermopower have different artificial structure dependences on each other, the total thermoelectric performance is maximized by optimizing the structure to balance these effects. We confirm the appearance of these thermoelectric effects by performing a finite element analysis of transverse thermoelectric fields in artificially tilted multilayers consisting of the ferromagnetic $\mathrm{C}{\mathrm{o}}_2\mathrm{MnGa}$ Heusler alloy and thermoelectric semiconductor $\mathrm{B}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_3$. This work will be a guideline for designing the optimum structural parameters for superior transverse thermoelectric performance through the hybridization of spin- and magnetism-related thermoelectric phenomena in artificially tilted multilayers.

Close

PrevNext

View figure in article

• Anomalous Hall effect
• Seebeck effect
• Spin caloritronics
• Thermoelectric effects
• Thermopower