Understanding Magnetic Exchange Interactions by the Pressure Dependent Curie Temperature in FeCoNiCuMn High Entropy Alloys
Journal Article
·
· Journal of Phase Equilibria and Diffusion
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Santa Clara Univ., Santa Clara, CA (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
Here, 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.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1890798
- Report Number(s):
- LLNL-JRNL-782842; 978005
- Journal Information:
- Journal of Phase Equilibria and Diffusion, Journal Name: Journal of Phase Equilibria and Diffusion Journal Issue: 5 Vol. 42; ISSN 1547-7037
- Publisher:
- ASM InternationalCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Predicting temperature-dependent ultimate strengths of body-centered-cubic (BCC) high-entropy alloys
Influence of non-magnetic Cu on enhancing the low temperature magnetic properties and Curie temperature of FeCoNiCrCu(x) high entropy alloys
Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L1{sub 0}-MnGa/Co{sub 2}FeAl Heusler bilayers
Journal Article
·
2021
· npj Computational Materials
·
OSTI ID:1847107
+3 more
Influence of non-magnetic Cu on enhancing the low temperature magnetic properties and Curie temperature of FeCoNiCrCu(x) high entropy alloys
Journal Article
·
2020
· Scripta Materialia
·
OSTI ID:1736016
+2 more
Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L1{sub 0}-MnGa/Co{sub 2}FeAl Heusler bilayers
Journal Article
·
2014
· Journal of Applied Physics
·
OSTI ID:22402813