Understanding Magnetic Exchange Interactions by the Pressure Dependent Curie Temperature in FeCoNiCuMn High Entropy Alloys

Author(s)
Perrin, Alice; McCall, Scott; McElfresh, Michael; Laughlin, David E.; McHenry, Michael E.
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Abstract
Abstract We report the pressure (P) dependent Curie temperature, Tc (P) in a FeCoNiCuMn high entropy alloy (HEA). We analyze Tc (P) in terms of d-orbital contraction to explain changes in magnetic exchange interactions (Jex). Considerations of the d-radius contraction inferred from the composition dependence of Tc in γ-Fe-Ni are combined with experimental data for P-dependent lattice constants and magnetic measurements of Tc (P), to calculate contributions of atomic spacing and d-orbital radii to Jex. We show the d-orbital contraction with P captures most of the Tc variation in this alloy.
Date issued
2021-08
URI
https://hdl.handle.net/1721.1/133120
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Journal of Phase Equilibria and Diffusion
Publisher
Springer US
Citation
Perrin, A., McCall, S., McElfresh, M. et al. Understanding Magnetic Exchange Interactions by the Pressure Dependent Curie Temperature in FeCoNiCuMn High Entropy Alloys. J. Phase Equilib. Diffus. 42, 617–622 (2021)
Version: Author's final manuscript
ISSN
1863-7345
1547-7037
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