Large Room Temperature Anomalous Transverse Thermoelectric Effect in Kagome Antiferromagnet YMn₆Sn₆

Abstract

Kagome magnets possess several novel nontrivial topological features owing to the strong correlation between topology and magnetism that extends to their applications in the field of thermoelectricity. Conventional thermoelectric (TE) devices use the Seebeck effect to convert heat into electrical energy. In contrast, transverse thermoelectric devices based on the Nernst effect are attracting recent attention due to their unique transverse geometry, which uses a single material to eliminate the need for a multitude of electrical connections compared to conventional TE devices. Here, a large anomalous transverse thermoelectric effect of ≈2 µV K−1 at room temperature in a kagome antiferromagnet YMn6Sn6 single crystal is obtained. The obtained value is larger than that of state‐of‐the‐art canted antiferromagnetic (AFM) materials and comparable with ferromagnetic systems. The large anomalous Nernst effect (ANE) can be attributed to the net Berry curvature near the Fermi level. Furthermore, the ANE of the AFM YMn6Sn6 exceeds the magnetization scaling relationship of conventional ferromagnets. The results clearly illustrate that AFM material YMn6Sn6 is an ideal topological material for room‐temperature transverse thermoelectric applications.

Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd2As2

“…We plotted and compared anomalous Nernst thermopower for FM-EuCd 2 As 2 with AFM-EuCd 2 As 2 , other reported ferromagnets and non-collinear As 2 in the present study and previously reported ferromagnet, antiferromagnet materials. [32,39,[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] antiferromagnets (Figure 5). [32,39,[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] FM-EuCd 2 As 2 exhibits large anomalous Nernst signal because the Weyl points lies close to Fermi level.…”

Thermoelectric Modules: Key Issues in Architectural Design and Contact Optimization

“… working principle of thermoelectric conversion, i. e. the thermoelectric effect in longitudinal and transverse direction or the p‐n junction; [12,42–46] assumption of the geometrical model i. e. cuboid/ cylindrical; [47–50] dimension i. e. bulk or thin film; [51–55] flexibility i. e. flexible or rigid [56–61] …”

“…working principle of thermoelectric conversion, i. e. the thermoelectric effect in longitudinal and transverse direction or the p‐n junction; [12,42–46] …”

“…The architecture of the device (Figure 5) involves the I. working principle of thermoelectric conversion, i. e. the thermoelectric effect in longitudinal and transverse direction or the p-n junction; [12,[42][43][44][45][46] II. assumption of the geometrical model i. e. cuboid/ cylindrical; [47][48][49][50] III.…”

Flux Growth, Crystal Structure, and Chemical Bonding of Yb2PdGe3, an AlB2Superstructure within the Rare-Earth Series

“…Ternary rare-earth tetrelides RE – T – Tt ( RE = rare-earth metal; T = transition metal; Tt = tetrel element) have been heavily studied due to their intriguing structure peculiarities, unconventional physical properties, and unprecedented bonding scenarios. − Among them, intermetallics crystallizing with a disordered AlB 2 -type structure or with one of its ordered derivatives have attracted particular attention since the discovery of superconductivity with T c ∼ 39 K in MgB 2 , featuring similar honeycomb-like layers. Unfortunately, investigations of physical properties of these compounds were frequently not accompanied by accurate and in-depth structural analyses, which are indeed crucial to enable a correct interpretation of the observed phenomena.…”