About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Enhancement of cycle performance of (Mn,Fe,Ni)2(P,Si) Alloys for Room-Temperature Magnetic Cooling |
| Author(s) |
Jong-Woo Kim, Ki Hoon Kang, Daseul Shin, Kookchae Chung |
| On-Site Speaker (Planned) |
Jong-Woo Kim |
| Abstract Scope |
(Mn,Fe,Ni)2(P,Si) magnetocaloric alloys are promising candidates for room-temperature magnetic cooling due to their large entropy change and tunable magnetoelastic transitions. However, strong magnetoelastic coupling often induces large thermal hysteresis, leading to energy loss and poor repeatability during cyclic operation. In this work, we systematically adjusted the composition and introduced partial substitution of phosphorus with boron to suppress hysteresis. This modification reduced the thermal hysteresis to below 1.5 K while maintaining a magnetocaloric effect above 15 J/kg·K at 2 T. The resulting boron-substituted alloys showed improved cyclic stability and reduced energy loss. Real cooling performance was assessed using a custom-built direct measurement system under field cycling. Compared to Gd, the optimized alloys demonstrated excellent reproducibility and practical applicability. This study highlights the importance of compositional control in managing magnetoelastic behavior and provides insight into the development of cycle-stable, rare-earth-free magnetic refrigerants. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Powder Materials, |