|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications X
||Advancing the Thermoelectric Performance
of Full Heusler Alloys
||Ernst Bauer, Fabian Garmroudi, Matthias Knopf, Alexander Riss, Michael Parzer, Takao Mori
|On-Site Speaker (Planned)
XYZ (half-Heusler) and X2YZ (full-Heusler) ternaries form extended families of materials, with a large variety of ground states, hence, with numerous prospects for technical applications. Here, X and Y are transition metal elements and Z is a main group element. Both of these families crystallise in a cubic structure with the prototypic LiAlSi-structure (C1b-type) for the former and the Cu2MnAl-strucutre (L21-type) for the latter.
The present work aims to demonstrate how appropriate co-substitutions in the full-Heusler system Fe2VAl dramatically enhances the thermoelectric performance, arriving at thermoelectric power factors (PF > 10 mW/mĚK2 ), exceeding best performing Bi2Te3-based systems by a factor of 2 to 3 around room temperature. Here, experimental data will be analysed by DFT results, and by appropriate phenomenological models in order to trace the evolution of physical features.
 F. Garmroudi et al., PRB, 103, 085202 (2021)
Research supported by JST, project MIRAI.
||Electronic Materials, Modeling and Simulation, Energy Conversion and Storage