This title appears in the Scientific Report : 2019 

Combinatorial evaluation of phase formation and magnetic properties of FeMnCoCrAl high entropy alloy thin film library
Marshal, A. (Corresponding author)
Pradeep, K. G. / Music, D. / Wang, Liming / Petracic, O. / Schneider, J. M.
Streumethoden; JCNS-2
JARA - HPC; JARA-HPC
JARA-FIT; JARA-FIT
Streumethoden; PGI-4
Scientific reports, 9 (2019) 1, S. 7864
[London] Macmillan Publishers Limited, part of Springer Nature 2019
10.1038/s41598-019-44351-8
Journal Article
Jülich Centre for Neutron Research (JCNS)
Materials and Processes for Energy and Transport Technologies
Quantum Condensed Matter: Magnetism, Superconductivity
Controlling Collective States
Controlling Collective States
QUANTUM MECHANICALLY GUIDED MATERIALS DESIGN
OpenAccess
OpenAccess
Please use the identifier: http://dx.doi.org/10.1038/s41598-019-44351-8 in citations.
Please use the identifier: http://hdl.handle.net/2128/22245 in citations.
We report on the influence of the Al content (from 3.5 to 54 at.%) on phase formation and magnetic properties in FeMnCoCrAl high entropy alloy thin film libraries. Al additions to FeMnCoCr crystallizing in the alpha-Mn structure cause the formation of the body centered cubic (BCC) structure. This is consistent with density functional theory predictions as Al additions give rise to a larger stability for the BCC phase compared to the face centered cubic phase (FCC) which can be rationalized by the formation of a pseudogap at the Fermi level indicating the stabilization of the BCC phase over the FCC phase. Al additions to paramagnetic FeMnCoCr induce ferromagnetism. The largest saturation magnetization was measured for the film containing 8 at.% of Al. As the concentration of non-ferromagnetic Al is increased beyond 8 at.%, the number density of the ferromagnetic species is decreased causing a concomitant decrease in magnetization. This trend is consistent with ab initio predictions of the Al concentration induced changes in the magnetic moment. Based on the experimental and theoretical results presented here the effect of the Al concentration on the phase formation and the magnetic properties of FeMnCoCrAl thin film library can be rationalized.