Magnetic properties of the CrMnFeCoNi high-entropy alloy

Schneeweiss, Oldřich; Friák, Martin; Dudová, Marie; Holec, David; Šob, Mojmír; Kriegner, Dominik; Holý, Václav; Beran, Přemysl; George, Easo P.; Neugebauer, Jörg; Dlouhý, Antonín

doi:10.1103/PhysRevB.96.014437

Title: Magnetic properties of the CrMnFeCoNi high-entropy alloy

Journal Article · Fri Jul 28 00:00:00 EDT 2017 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.96.014437· OSTI ID:1376503

Schneeweiss, Oldřich ^[1]; Friák, Martin ^[2]; Dudová, Marie ^[1]; Holec, David ^[3]; Šob, Mojmír ^[4]; Kriegner, Dominik ^[5]; Holý, Václav ^[5]; Beran, Přemysl ^[6]; George, Easo P. ^[7]; Neugebauer, Jörg ^[8]; Dlouhý, Antonín ^[1]

Academy of Sciences of the Czech Republic, Brno (Czech Republic). Inst. of Physics of Materials
Academy of Sciences of the Czech Republic, Brno (Czech Republic). Inst. of Physics of Materials; Masaryk Univ., Brno (Czech Republic). Central European Inst. of Technology
Montanuniversitat Leoben (Austria). Dept. of Physical Metallurgy and Materials Testing
Academy of Sciences of the Czech Republic, Brno (Czech Republic). Inst. of Physics of Materials; Masaryk Univ., Brno (Czech Republic). Central European Inst. of Technology. Dept. of Chemistry
Charles Univ., Prague (Czech Republic). Faculty of Mathematics and Physics
Academy of Sciences of the Czech Republic, Husinec (Czech Republic). Nuclear Physics Inst.
Ruhr Univ., Bochum (Germany). Inst. for Materials
Max Planck Inst. for Iron Research, Dusseldorf (Germany)

In this paper, we present experimental data showing that the equiatomic CrMnFeCoNi high-entropy alloy undergoes two magnetic transformations at temperatures below 100 K while maintaining its fcc structure down to 3 K. The first transition, paramagnetic to spin glass, was detected at 93 K and the second transition of the ferromagnetic type occurred at 38 K. Field-assisted cooling below 38 K resulted in a systematic vertical shift of the hysteresis curves. Strength and direction of the associated magnetization bias was proportional to the strength and direction of the cooling field and shows a linear dependence with a slope of 0.006 ± 0.001 emu T. The local magnetic moments of individual atoms in the CrMnFeCoNi quinary fcc random solid solution were investigated by ab initio (electronic density functional theory) calculations. Results of the numerical analysis suggest that, irrespective of the initial configuration of local magnetic moments, the magnetic moments associated with Cr atoms align antiferromagnetically with respect to a cumulative magnetic moment of their first coordination shell. The ab initio calculations further showed that the magnetic moments of Fe and Mn atoms remain strong (between 1.5 and 2 μ_B), while the local moments of Ni atoms effectively vanish. Finally, these results indicate that interactions of Mn- and/or Fe-located moments with the surrounding magnetic structure account for the observed macroscopic magnetization bias.

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Research Organization:: Academy of Sciences of the Czech Republic, Brno (Czech Republic); Charles Univ., Prague (Czech Republic); Masaryk Univ., Brno (Czech Republic); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Czech Science Foundation (Czech Republic); Academy of Sciences of the Czech Republic; Ministry of Education, Youth and Sports of the Czech Republic; European Regional Development Fund (ERDF) (Belgium)

Contributing Organization:: Ruhr Univ., Bochum (Germany); Max Planck Inst. for Iron Research, Dusseldorf (Germany); Montanuniversitat Leoben (Austria)

Grant/Contract Number:: AC05-00OR22725; GA14-22834S; RVO:68081723; LQ1601; LM2015069; LM2015070; LM2015085; LM2015042; CZ.02.1.01/0.0/0.0/15.003/000045

OSTI ID:: 1376503

Alternate ID(s):: OSTI ID: 1373323

Journal Information:: Physical Review B, Vol. 96, Issue 1; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 98 works

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Magnetic dilution by severe plastic deformation Stückler, Martin; Weissitsch, Lukas; Wurster, Stefan Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2021-00290	text	January 2020
Hidden Mn magnetic-moment disorder and its influence on the physical properties of medium-entropy NiCoMn solid solution alloys Mu, Sai; Yin, J.; Samolyuk, G. D. Universität Regensburg https://doi.org/10.5283/epub.40391	text	January 2019
Uncovering electron scattering mechanisms in NiFeCoCrMn derived concentrated solid solution and high entropy alloys Mu, Sai; Samolyuk, G. D.; Wimmer, S. arXiv https://doi.org/10.48550/arxiv.1806.03785	text	January 2018

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