About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Alloys and Compounds for Thermoelectric and Solar Cell Applications XII
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Presentation Title |
Phase Transition-induced Thermal Hysteresis and Their Significance in Thermoelectricity |
Author(s) |
Mona Zebarjadi |
On-Site Speaker (Planned) |
Mona Zebarjadi |
Abstract Scope |
The structural phase transition is accompanied by electron and phonon dispersion changes and sharp modifications of electronic and phononic transport properties versus temperature. In particular, the sharp variations of the Seebeck coefficient and the heat capacity can be used for the design of heat management and thermal to electrical power generation devices. Sharp changes in the Seebeck coefficient result in large Thomson coefficients which induce heat release or absorption under the simultaneous application of a charge current and a temperature gradient in conductors, with applications in refrigeration. Most materials show a minor Thomson coefficient much smaller than the Seebeck coefficient. In this talk, I will present our results of phase transition-induced thermal hysteresis in FeRh alloys and 1T’-Td phase transition in type II Weyl semimetallic MoTe2 and Mo1-xWxTe2. In the latter case, we show consistency between the Seebeck hysteresis and direct measurements of the crystallographic angle using temperature-dependent X-ray diffraction. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Electronic Materials, Computational Materials Science & Engineering |