About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Multifunctional nanocrystalline RE-TM compounds |
| Author(s) |
Lotfi Bessais, Jacques Moscovici, Abderrahime Ayadim |
| On-Site Speaker (Planned) |
Lotfi Bessais |
| Abstract Scope |
Rare-Earth-Transition-Metal (R-T) intermetallic compounds show promise for permanent magnets and magnetocaloric refrigeration. We synthesized samples via ball milling and rapid annealing.
While X-ray diffraction reveals long-range order, understanding these materials' exceptional properties requires local atomic environment analysis. For iron-substituted R-T compounds, identifying the iron substitution site is key. Since Mössbauer studies were not feasible due to iron concentration, we relied on magnetic measurements and magnetocaloric effect (MCE) analysis.
Pr₅Co₁₉ exhibited optimal magnetic properties, including 1.5 T coercivity at room temperature. These compounds also showed a substantial magnetic entropy change (ΔSmax) of 5.2 J/(kg·K) under a low 0-1 T magnetic field at their Curie temperature. These findings highlight their potential for permanent magnet and magnetic refrigeration technologies. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Nanotechnology, Environmental Effects |