Article (Scientific journals)
Experimental determination of the temperature- and phase-dependent elastic constants of FeRh
Ourdani, D.; Castellano, Aloïs; Vythelingum, A.K. et al.
2024In Physical Review. B, 110 (1)
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Keywords :
Acoustic experiments; Antiferromagnetic phasis; Brillouin light scattering; Experimental determination; Ferromagnetic and anti-ferromagnetic; Ferromagnetic phasis; Phase dependent; Picosecond acoustics; Rayleigh wave velocity; Temperature dependent; Electronic, Optical and Magnetic Materials; Condensed Matter Physics
Abstract :
[en] The elastic constants of an epitaxial film of FeRh have been determined experimentally in both ferromagnetic (FM) and antiferromagnetic (AF) phases, using a combination of Brillouin light scattering and picosecond acoustics experiments. The C11 constant is noticeably larger in the FM phase than in the AF phase, while C12 and C44 are both lower, leading to larger Rayleigh wave velocities in the FM phase than in the AF phase. The elastic constants were calculated numerically using first-principles anharmonic modeling and machine-learned interatomic potentials. We find that using a temperature-dependent effective potential is indispensable to correctly reproduce the experimental values to within 80-100%. The accurate knowledge of the temperature- and phase-dependences of the elastic constants of crystalline FeRh are valuable ingredients for the predictive modeling of the acoustic and magnetoacoustic properties of this magnetostrictive material.
Research Center/Unit :
Q-MAT - Quantum Materials - ULiège
Disciplines :
Physics
Author, co-author :
Ourdani, D. ;  Sorbonne Université, CNRS, Institut des Nanosciences de Paris, Paris, France ; LSPM, Université Paris 13, Sorbonne Paris Cité, Villetaneuse, France
Castellano, Aloïs  ;  Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures
Vythelingum, A.K.;  Sorbonne Université, CNRS, Institut des Nanosciences de Paris, Paris, France
Arregi, J.A. ;  CEITEC, Brno University of Technology, Brno, Czech Republic
Uhlíř, V. ;  CEITEC, Brno University of Technology, Brno, Czech Republic ; Institute of Physical Engineering, Brno University of Technology, Brno, Czech Republic
Perrin, B.;  Sorbonne Université, CNRS, Institut des Nanosciences de Paris, Paris, France
Belmeguenai, M. ;  LSPM, Université Paris 13, Sorbonne Paris Cité, Villetaneuse, France
Roussigné, Y. ;  LSPM, Université Paris 13, Sorbonne Paris Cité, Villetaneuse, France
Gourdon, C. ;  Sorbonne Université, CNRS, Institut des Nanosciences de Paris, Paris, France
Verstraete, Matthieu  ;  Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures ; ITP, Physics Department, Utrecht University, Utrecht, Netherlands
Thevenard, L. ;  Sorbonne Université, CNRS, Institut des Nanosciences de Paris, Paris, France
Language :
English
Title :
Experimental determination of the temperature- and phase-dependent elastic constants of FeRh
Publication date :
July 2024
Journal title :
Physical Review. B
ISSN :
2469-9950
eISSN :
2469-9969
Publisher :
American Physical Society
Volume :
110
Issue :
1
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Tier-1 supercalculateur
Name of the research project :
ARC DREAMS
Funders :
ANR - Agence Nationale de la Recherche
MSMT - Ministerstvo školství, mládeže a tělovýchovy České republiky
F.R.S.-FNRS - Fonds de la Recherche Scientifique
Funding text :
This work has been partly supported by the French Agence Nationale de la Recherche (ANR ACAF 20-CE30-0027). Access to the CEITEC Nano Research Infrastructure was supported by the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic under the project CzechNanoLab (LM2023051). A.C. and M.J.V. acknowledge the Fonds de la Recherche Scientifique (FRS-FNRS Belgium) for PdR Grant No. T.0103.19 - ALPS, and ARC project DREAMS (G.A. 21/25-11) funded by F\u00E9d\u00E9ration Wallonie Bruxelles and ULiege. Simulation time was awarded by the Belgian share of EuroHPC in LUMI hosted by CSC in Finland, by the CECI (FRS-FNRS Belgium Grant No. 2.5020.11), as well as the Zenobe Tier-1 of the F\u00E9d\u00E9ration Wallonie-Bruxelles (Walloon Region Grant Agreement No. 1117545). We acknowledge the technical assistance of Mathieu Bernard from Institut des Nanosciences de Paris.
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