|About this Abstract
||2024 TMS Annual Meeting & Exhibition
||Advanced Soft Magnets and Magnetocaloric Materials: An FMD Symposium in Honor of Victorino Franco
||Magnetoelastic Coupling Transition Behavior in (Mn,Ni,Fe)2(P,Si) Alloys
||Ki Hoon Kang, A Young Lee, Jong-Woo Kim
|On-Site Speaker (Planned)
||Ki Hoon Kang
Among the magnetocaloric materials, (Mn,Fe)2(P,Si) alloys are one of the promising materials with its excellent properties. In this work, we investigated a compositional approach to observe the magnetoelastic coupling phenomenon in which magnetic phase transition occurs according to lattice variation in the alloys. With the composition variations, a significant influence of transition metal doping on the lattice structure and the formation of characteristic temperature groups were revealed. Through this compositional approach, the magnetic entropy change is recorded as high as >15 J/kg K at 2T in the room temperature range, remarkably comparable to other giant MCMs. Furthermore, this alloy exhibited a table-top shape magnetic entropy change curve, and was confirmed as a phenomenon resulting from the formation of multi-phase transition in the Fe2P-type hexagonal structure. In this presentation, the compositional approach in magnetocaloric material design and its possibility for room-temperature magnetic cooling applications will be discussed in detail.