Keywords :
Analytical approach; Antiferromagnetic orderings; Applied magnetic fields; First principle calculations; Heisenberg models; Magnetoelectric response; Nonlinear changes; Perovskite oxides; Rare earth orthoferrites; Theoretical study; Electronic, Optical and Magnetic Materials; Condensed Matter Physics; Physics - Materials Science
Abstract :
[en] We report a theoretical study of the nonlinear magnetoelectric response of GdFeO3 through an analytical approach combined with a Heisenberg model, which is fitted against first-principles calculations. Our theory reproduces the nonlinear change of polarization under applied magnetic field reported experimentally such that it allows us to analyze the origin of the large responses in different directions. We show that the nonlinear character of the response in these materials originates from the fact that the antiferromagnetic order of Gd atoms changes nonlinearly with respect to the applied magnetic field. Our model can be generalized to other materials in which the antiferromagnetic ordering breaks inversion symmetry.
Funding text :
This work has been funded by the Communauté Française de Belgique (ARC AIMED G.A. 15/19-09). E.B and A.S thanks the FRS-FNRS for support. J.Í. thanks the support of the Luxembourg National Research Fund through Grant No. FNR/C18/MS/12705883 “REFOX”. The authors acknowledge the CECI supercomputer facilities funded by the F.R.S-FNRS (Grant No. 2.5020.1), the Tier-1 supercomputer of the Fédération Wallonie-Bruxelles funded by the Walloon Region (Grant No. 1117545) and the OFFSPRING PRACE project.
Scopus citations®
without self-citations
6