Highly complex magnetic behavior resulting from hierarchical phase separation in AlCo(Cr)FeNi high-entropy alloys
Qianqian Lan, András Kovács, Jan Caron, Hongchu Du, Dongsheng Song, Sriswaroop Dasari, Bharat Gwalani, Varun Chaudhary, R.V. Ramanujan, Rajarshi Banerjee, Rafal E. Dunin‐Borkowski
Abstract
FeNi HEA on the formation of magnetic vortex states within individual A2 (disordered BCC) precipitates, which are distributed in an ordered B2 matrix that is weakly ferromagnetic. Non-magnetic or weakly ferromagnetic B2 precipitates in large magnetic domains of the A2 phase, and strongly magnetic Fe-Co-rich interphase A2 regions, are also observed. These results provide important insight into the origin of coercivity in this HEA, which can be attributed to a complex magnetization process that includes the successive reversal of magnetic vortices.
Topics & Concepts
FerromagnetismMaterials scienceCoercivityInterphaseCondensed matter physicsMagnetizationPhase (matter)High entropy alloysChemical physicsMicrostructureChemistryMagnetic fieldPhysicsMetallurgyQuantum mechanicsBiologyOrganic chemistryGeneticsHigh Entropy Alloys StudiesHigh-Temperature Coating BehaviorsAdditive Manufacturing Materials and Processes