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Understanding Magnetic Exchange Interactions by the Pressure Dependent Curie Temperature in FeCoNiCuMn High Entropy Alloys
Journal of Phase Equilibria and Diffusion ( IF 1.5 ) Pub Date : 2021-08-27 , DOI: 10.1007/s11669-021-00920-x
Alice Perrin 1 , Scott McCall 2 , Michael McElfresh 3 , David E. Laughlin 4 , Michael E. McHenry 4
Affiliation  

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.



中文翻译:

通过压力相关的居里温度了解 FeCoNiCuMn 高熵合金中的磁交换相互作用

我们报告了 FeCoNiCuMn 高熵合金 (HEA) 中与压力 (P) 相关的居里温度 T c (P)。我们根据 d 轨道收缩分析 T c (P) 以解释磁交换相互作用 (J ex ) 的变化。从γ-Fe-Ni 中T c的成分依赖性推断出的 d 半径收缩的考虑与 P 依赖晶格常数的实验数据和 T c (P) 的磁测量数据相结合,以计算原子间距和 d 的贡献-J ex 的轨道半径。我们展示了 P 的 d 轨道收缩捕获了该合金中的大部分 T c变化。

更新日期:2021-08-27
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