Antiferromagnetism and Phase Stability of CrMnFeCoNi High-Entropy Alloy

Li Zhu; Haiyan He; Muhammad Naeem; Xun Sun; Ji Qi; Peng Liu; Stefanus Harjo; Kenji Nakajima; Bing Li; Xun-Li Wang

doi:10.1103/PhysRevLett.133.126701

Antiferromagnetism and Phase Stability of CrMnFeCoNi High-Entropy Alloy

Li Zhu, Haiyan He, Muhammad Naeem, Xun Sun, Ji Qi, Peng Liu, Stefanus Harjo, Kenji Nakajima, Bing Li^*, Xun-Li Wang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Abstract

It has long been suspected that magnetism could play a vital role in the phase stability of multicomponent high-entropy alloys. However, the nature of the magnetic order, if any, has remained elusive. Here, by using elastic and inelastic neutron scattering, we demonstrate evidence of antiferromagnetic order below ∼80 K and strong spin fluctuations persisting to room temperature in a single-phase face-centered cubic (fcc) CrMnFeCoNi high-entropy alloy. Despite the chemical complexity, the magnetic structure in CrMnFeCoNi can be described as γ-Mn-like, with the magnetic moments confined in alternating (001) planes and pointing toward the "111" direction. Combined with first-principles calculation results, it is shown that the antiferromagnetic order and spin fluctuations help stabilized the fcc phase in CrMnFeCoNi high-entropy alloy. © 2024 American Physical Society.

Original language	English
Article number	126701
Journal	Physical Review Letters
Volume	133
Issue number	12
Online published	17 Sept 2024
DOIs	https://doi.org/10.1103/PhysRevLett.133.126701
Publication status	Published - 20 Sept 2024

Funding

This work is supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China [C1020-21G], Shenzhen Science and Technology Program (Project No. JCYJ20220818101203007), and the Ministry of Science and Technology of China (Grants No. 2022YFE0109900 and No. 2021YFB3501201). X. L. W. thanks the Croucher Foundation for the Croucher Senior Research Fellowship (CityU Project No. 9509008). S. H. is thankful for the grant support from MEXT Program: Data Creation and Utilization Type Material Research and Development (JPMXP1122684766). H. H. acknowledges the support from the Guangdong Basic and Applied Basic Research Foundation (2023A1515140001) and the Large Scientific Facility Open Subject of Songshan Lake (KFKT2022B08), Dongguan, Guangdong. The elastic and inelastic neutron scattering experiments were carried out at the TAKUMI beamline of J-PARC under proposal No. 2017B0142 and No. 2022L0400 and at the AMATERAS beamline under proposal No. 2018A0176, respectively. This project also benefitted from the use of MPI beamline of China Spallation Neutron Source.

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COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: Zhu, L., He, H., Naeem, M., Sun, X., Qi, J., Liu, P., Harjo, S., Nakajima, K., Li, B., & Wang, X.-L. (2024). Antiferromagnetism and Phase Stability of CrMnFeCoNi High-Entropy Alloy. Physical Review Letters, 133(12), Article 126701. https://doi.org/10.1103/PhysRevLett.133.126701 The copyright of this article is owned by American Physical Society.

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title = "Antiferromagnetism and Phase Stability of CrMnFeCoNi High-Entropy Alloy",

abstract = "It has long been suspected that magnetism could play a vital role in the phase stability of multicomponent high-entropy alloys. However, the nature of the magnetic order, if any, has remained elusive. Here, by using elastic and inelastic neutron scattering, we demonstrate evidence of antiferromagnetic order below ∼80 K and strong spin fluctuations persisting to room temperature in a single-phase face-centered cubic (fcc) CrMnFeCoNi high-entropy alloy. Despite the chemical complexity, the magnetic structure in CrMnFeCoNi can be described as γ-Mn-like, with the magnetic moments confined in alternating (001) planes and pointing toward the {"}111{"} direction. Combined with first-principles calculation results, it is shown that the antiferromagnetic order and spin fluctuations help stabilized the fcc phase in CrMnFeCoNi high-entropy alloy. {\textcopyright} 2024 American Physical Society.",

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AU - Zhu, Li

AU - He, Haiyan

AU - Naeem, Muhammad

AU - Sun, Xun

AU - Qi, Ji

AU - Liu, Peng

AU - Harjo, Stefanus

AU - Nakajima, Kenji

AU - Li, Bing

AU - Wang, Xun-Li

PY - 2024/9/20

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N2 - It has long been suspected that magnetism could play a vital role in the phase stability of multicomponent high-entropy alloys. However, the nature of the magnetic order, if any, has remained elusive. Here, by using elastic and inelastic neutron scattering, we demonstrate evidence of antiferromagnetic order below ∼80 K and strong spin fluctuations persisting to room temperature in a single-phase face-centered cubic (fcc) CrMnFeCoNi high-entropy alloy. Despite the chemical complexity, the magnetic structure in CrMnFeCoNi can be described as γ-Mn-like, with the magnetic moments confined in alternating (001) planes and pointing toward the "111" direction. Combined with first-principles calculation results, it is shown that the antiferromagnetic order and spin fluctuations help stabilized the fcc phase in CrMnFeCoNi high-entropy alloy. © 2024 American Physical Society.

AB - It has long been suspected that magnetism could play a vital role in the phase stability of multicomponent high-entropy alloys. However, the nature of the magnetic order, if any, has remained elusive. Here, by using elastic and inelastic neutron scattering, we demonstrate evidence of antiferromagnetic order below ∼80 K and strong spin fluctuations persisting to room temperature in a single-phase face-centered cubic (fcc) CrMnFeCoNi high-entropy alloy. Despite the chemical complexity, the magnetic structure in CrMnFeCoNi can be described as γ-Mn-like, with the magnetic moments confined in alternating (001) planes and pointing toward the "111" direction. Combined with first-principles calculation results, it is shown that the antiferromagnetic order and spin fluctuations help stabilized the fcc phase in CrMnFeCoNi high-entropy alloy. © 2024 American Physical Society.

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Antiferromagnetism and Phase Stability of CrMnFeCoNi High-Entropy Alloy

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CRF: Competing Deformation Mechanisms of Complex Alloys at Thermomechanical Extremes

CROU_RMG: In Situ Neutron Diffraction Study of Deformation at Low Temperatures- RMGS

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Antiferromagnetism and Phase Stability of CrMnFeCoNi High-Entropy Alloy

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CRF: Competing Deformation Mechanisms of Complex Alloys at Thermomechanical Extremes

CROU_RMG: In Situ Neutron Diffraction Study of Deformation at Low Temperatures- RMGS

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