DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Understanding Magnetic Exchange Interactions by the Pressure Dependent Curie Temperature in FeCoNiCuMn High Entropy Alloys

Journal Article · · Journal of Phase Equilibria and Diffusion
 [1];  [2];  [3];  [4];  [4]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Santa Clara Univ., Santa Clara, CA (United States)
  4. 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

References (32)

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes journal May 2004
The convolution equation of Choquet and Deny on [IN]-groups journal December 2001
Zur Theorie des Ferromagnetismus journal September 1928
Wechselwirkung neutraler Atome und hom�opolare Bindung nach der Quantenmechanik journal June 1927
Über den Einfluß der Geschwindigkeitsabhängigkeit der Elektronenmasse auf den Zeemaneffekt journal February 1925
The Role of Compositional Tuning of the Distributed Exchange on Magnetocaloric Properties of High-Entropy Alloys journal August 2017
Nearest and next nearest neighbor exchange interaction between magnetic ions in II–VI semimagnetic semiconductors journal April 1990
Vibrational thermodynamics of materials journal May 2010
MnFeNiGeSi high-entropy alloy with large magnetocaloric effect journal February 2021
Prediction of high-entropy stabilized solid-solution in multi-component alloys journal February 2012
Microstructural development in equiatomic multicomponent alloys journal July 2004
Microstructures and properties of high-entropy alloys journal April 2014
L'hypothèse du champ moléculaire et la propriété ferromagnétique journal January 1907
Electronic Structure of Alloys journal June 1937
Magnetic and Chemical Order in Pd2MnAl in Relation to Order in the Heusler Alloys Pd2MnIn, Pd2MnSn, and Pd2MnSb journal February 1968
High-pressure x-ray diffraction studies on the structure of liquid silicate using a Paris–Edinburgh type large volume press journal January 2011
Distributed exchange interactions and temperature dependent magnetization in amorphous Fe88−xCoxZr7B4Cu1 alloys journal April 1999
Electronic structure, exchange interactions, and Curie temperature of FeCo journal April 1999
The influence of pressure on the phase stability of nanocomposite Fe 89 Zr 7 B 4 during heating from energy dispersive x-ray diffraction journal May 2013
Thermomagnetic analysis of FeCoCr x Ni alloys: Magnetic entropy of high-entropy alloys journal May 2013
Mössbauer analysis of compositional tuning of magnetic exchange interactions in high entropy alloys journal March 2019
HPCAT: an integrated high-pressure synchrotron facility at the Advanced Photon Source journal September 2008
Calculating condensed matter properties using the KKR-Green's function method—recent developments and applications journal August 2011
Self-Consistent Equations Including Exchange and Correlation Effects journal November 1965
The Theory of Complex Spectra journal November 1929
Atomic Shielding Constants journal July 1930
Global expression for representing cohesive-energy curves journal November 1991
Efficient Ab initio Modeling of Random Multicomponent Alloys journal March 2016
Approximate Equation of State For Nickel Near its Critical Temperature journal October 1967
Curie Temperature Engineering in High Entropy Alloys for Magnetocaloric Applications journal January 2016
Recent progress in high-entropy alloys journal December 2006
High-Entropy Alloys – A New Era of Exploitation journal November 2007