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Title: Tailoring magnetic behavior of CoFeMnNiX (X = Al, Cr, Ga, and Sn) high entropy alloys by metal doping

Journal Article · · Acta Materialia
 [1];  [2];  [3];  [4];  [5];  [6];  [6];  [6];  [7];  [8]
  1. Univ. of Science and Technology, Beijing (China). State Key Lab. for Advanced Metals and Materials; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  2. National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, Albany, OR (United States)
  3. Tennessee State Univ., Nashville, TN (United States). Dept. of Physics and Mathematics
  4. Univ. of Science and Technology, Beijing (China). State Key Lab. for Advanced Metals and Materials; Univ. of Science and Technology, Beijing (China). State Key Lab. of Advanced Metallurgy
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
  6. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  7. National Energy Technology Lab. (NETL), Albany, OR (United States)
  8. Univ. of Science and Technology, Beijing (China). State Key Lab. for Advanced Metals and Materials

Magnetic materials with excellent performances are desired for functional applications. Based on the high-entropy effect, a system of CoFeMnNiX (X = Al, Cr, Ga, and Sn) magnetic alloys are designed and investigated. The dramatic change in phase structures from face-centered-cubic (FCC) to ordered body-centered-cubic (BCC) phases, caused by adding Al, Ga, and Sn in CoFeMnNiX alloys, originates from the potent short-range chemical order in the liquid state predicted by ab initio molecular dynamics (AIMD) simulations. This phase transition leads to the significant enhancement of the saturation magnetization (Ms), e.g., the CoFeMnNiAl alloy has Ms of 147.86 Am2/kg. In conclusion, first-principles density functional theory (DFT) calculations on the electronic and magnetic structures reveal that the anti-ferromagnetism of Mn atoms in CoFeMnNi is suppressed especially in the CoFeMnNiAl HEA because Al changes the Fermi level and itinerant electron-spin coupling that lead to ferromagnetism.

Research Organization:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0004000; FE0008855; FE0011194; FE0024054; FE0011549; FE-0008855; FE-0011194; FE-0024054; FE-0011549
OSTI ID:
1393391
Alternate ID(s):
OSTI ID: 1398625
Journal Information:
Acta Materialia, Vol. 130, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 149 works
Citation information provided by
Web of Science

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Cited By (13)

Effects of Mn and Al addition on structural and magnetic properties of FeCoNi-based high entropy alloys journal August 2018
Science and technology in high-entropy alloys journal January 2018
Phase Stability and Thermo-Physical Properties of Nickel-Aluminum Binary Chemically Disordered Systems via First-Principles Study journal December 2019
Alloying, magnetic and corrosion behavior of AlCrFeMnNiTi high entropy alloy journal November 2018
Microstructure and Properties of CoCrFeNi(WC) High-Entropy Alloy Coatings Prepared Using Mechanical Alloying and Hot Pressing Sintering journal December 2018
Microstructures and properties of high-entropy alloy films and coatings: a review journal February 2018
Computational characterization of the structural and mechanical properties of Al x CoCrFeNiTi 1− x high entropy alloys journal July 2019
High-entropy functional materials journal September 2018
Pressure-induced magnetovolume effect in CoCrFeAl high-entropy alloy journal May 2019
Compositional Design of Soft Magnetic High Entropy Alloys by Minimizing Magnetostriction Coefficient in (Fe0.3Co0.5Ni0.2)100−x(Al1/3Si2/3)x System journal March 2019
An as-cast high-entropy alloy with remarkable mechanical properties strengthened by nanometer precipitates journal January 2020
A Review of Multi-Scale Computational Modeling Tools for Predicting Structures and Properties of Multi-Principal Element Alloys journal February 2019
Pressure-induced magnetovolume effect in CoCrFeAl high-entropy alloy text January 2019

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