Nanocrystalline CoCrFeNiMn high-entropy alloy with tunable ferromagnetic properties. (30th June 2021) - Wang, Junjie
Graphical abstract: Highlights: Ferromagnetic CoCrFeNiMn HEA was prepared for the first time by inert gas condensation using a laser source (laser-IGC). Saturation magnetization and curie temperature are tunable via heat treatment. CoCrFeNiMn laser-IGC HEA has nano-multiphase structure. Preparation method is proposed which may trigger intensive studies in design concepts of emerging materials with unique structures. Abstract: A nanocrystalline CoCrFeNiMn high-entropy alloy (nc-HEA) with nano-multiphase structure was prepared by inert gas condensation (IGC) using a laser evaporation source. Encouragingly, the laser-IGC nc-HEA exhibits unexpected ferromagnetic behavior and the Curie temperature ( T c ) increased nearly 10 times compared to any CoCrFeNiMn HEAs prepared by various other methods. In addition, the saturation magnetization ( M s ) and T c of the laser-IGC nc-HEA can be controlled via heat treatment, which is resulting from the formation and structural evolution of magnetic nanophases during annealing. This work widens the design toolbox for high-performance nc-HEAs based upon laser-IGC technique.