About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Elements Alloys X: Structures and Modeling
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Presentation Title |
Magnetism in Metastable and Annealed HEAs of (FeNiCrMn) |
Author(s) |
Nan Tang, Lizabeth Quigley, Walker L. Boldman, Cameron S. Jorgensen, Rémi Koch, Daniel O'Leary, Hugh Medal, Philip Rack, Dustin A. Gilbert |
On-Site Speaker (Planned) |
Dustin A. Gilbert |
Abstract Scope |
Using by room-temperature combinatorial sputtering, metastable films of (Fe,Ni,Cr,Mn) were prepared. The mixed ferromagnetic/antiferromagnetic interactions in these alloys result in frustrated magnetic behavior which resolves below 50 K. At low temperatures, the coercivity achieves values of nearly 500 mT, which is comparable to some high-anisotropy magnetic materials. Commensurate with the divergent coercivity is an atypical drop in the temperature dependent magnetization. These effects are explained by a mixed magnetic phase model, consisting of ferro-, antiferro , and frustrated magnetic regions, and are rationalized by simulations. A machine-learning algorithm is employed to visualize the parameter space and inform the development of subsequent compositions. Annealing the samples at 600 °C orders the sample, more-than doubling the Curie temperature and increasing the saturation magnetization by as much as 5×. Simultaneously, the large coercivities are suppressed, resulting in magnetic behavior that is largely temperature independent over a range of 350 K. |
Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |
Keywords |
Magnesium, High-Entropy Alloys, Thin Films and Interfaces |