| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Utilizing high entropy concept tunes the crossover critical point in magnetocaloric materials |
| Author(s) |
Zhengying Tian, Luis M. Moreno-Ramírez, Jia Yan Law, Victorino Franco, Fengxia Hu, Baogen Shen |
| On-Site Speaker (Planned) |
Jia Yan Law |
| Abstract Scope |
The use of the magnetocaloric effect (MCE) for gas liquefaction has renewed interest in cryogenic magnetocaloric materials, especially the classic RCo<sub>2</sub> Laves phase (R denotes lanthanide element). Based on lanthanide selection, their thermomagnetic phase transitions can be first- or second-order. We applied the high-entropy alloy (HEA) design concept to the R-site, finding that the critical crossover point (where first-order crossovers to second-order) shifts yet maintains high MCE values multiprincipal-R-Co<sub>2</sub>. This is in contrast to the typical subpar MCE performance reported in magnetocaloric lanthanide-HEAs. Our quantitative n criterion clearly identified the thermomagnetic phase transition order and regime of the critical point, thus resolving previous controversies. Supported by a grant from Junta de la Andalucia referred to as EMERGIA 2021 Fellowship (Ref. EMC21_00418), the Clean Hydrogen Partnership and its members within the project HyLICAL (Grant no. 101101461), the European Innovation Council, funded by the European Union. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, High-Entropy Alloys, Phase Transformations |