| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIII
|
| Presentation Title |
Developing Co2MnGa-Based Topological Heusler Magnets for Transverse Thermoelectric Conversion |
| Author(s) |
Chenguang Fu, Mengzhao Chen, Tiejun Zhu |
| On-Site Speaker (Planned) |
Chenguang Fu |
| Abstract Scope |
Topological magnets (TMs) with the coupled topology of electronic band structures and spin configuration have exhibited exotic transport properties that are overwhelmingly appealing for transverse thermoelectric applications. Despite the continuous discovery of TMs in recent years, the development of Nernst generators has much lagged. Here, I will present the work on the development of high-performance Nernst generators utilizing polycrystalline topological Heusler magnets. Benefiting from the robustness of topological effect to grain boundary scattering, polycrystalline Co2MnGa was found to exhibit a large Nernst thermopower of about 6.5 microV/K at 300 K, which is comparable to the previously reported record value in its single crystal. The developed Nernst generators thereby exhibit excellent performance with an output voltage of 5.4 mV and power of 14.3 microW, significantly higher than that of Nernst thermopiles assembled using conventional ferromagnets. These results highlight TMs with intrinsically large Berry curvature for transverse thermoelectric conversion. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, |