Sign-reversed anomalous Nernst effect with matched Seebeck coefficient in lanthanide-iron alloys for the direct sensing of heat flux.

ABSTRACT: Heat flux sensors based on the anomalous Nernst effect (ANE) have emerged as a promising solution for achieving thin and flexible designs. ANE-based heat flux sensors typically employ thermopile structures composed of two ANE materials with opposite signs, connected in series to enhance sensing performance. However, a mismatch in the Seebeck coefficient between the two ANE materials causes a considerable offset voltage due to the Seebeck effect (SE) under oblique heat flux. This parasitic sensing voltage hinders direct sensing of heat flux in the intended direction. In this study, a sign-reversed ANE with matched Seebeck coefficient is examined in Fe₃Ln (Ln = Gd, Tb, Dy, Ho, and Er), enabling a thermopile structure free from the SE-induced offset voltage. Based on density functi

SUBMITTER: Yu H 

PROVIDER: S-EPMC12409908 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature