| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
TFORC and Thermography: Complementary Techniques for characterizing Hysteresis, Reversibility, and Partial Transformations in Magnetocaloric Materials |
| Author(s) |
Victorino Franco, Jorge Revuelta-Losada, Aun N Khan, Luis M Moreno-Ramírez, Jia Yan Law |
| On-Site Speaker (Planned) |
Victorino Franco |
| Abstract Scope |
Caloric refrigeration promises to allow us to make the transition to more sustainable temperature control systems, but hysteresis and lack of reversibility in cyclic operation are important hurdles that need to be overcome without reducing the performance of materials. Here we present the physics behind the recently proposed temperature-FORC (TFORC) technique for magnetocaloric materials, its use to identify detailed information of phase transitions, and for predicting the thermomagnetic response of a sample in arbitrary conditions. The reversible response under cyclic excitations can also be independently determined by thermography, showing that some of the simple approximations present in the literature should be used with caution. Examples are presented for Heusler, MM’X, and high-entropy alloys. The methodology presented here will be instrumental in the implementation of more efficient caloric refrigeration devices. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, High-Entropy Alloys, Phase Transformations |