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Name linear_magnetic_coefficient_in_Cr2O3_JPCM2024
Extended ID linear_magnetic_coefficient_in_Cr2O3_JPCM2024_BousquetLelievre-BernaQureshiSohSpaldinUrruVerbeekWeber__DS_82x5bfiiyaij_0
Description We establish the sign of the linear magnetoelectric (ME) coefficient, α, in chromia, Cr₂O₃. Cr₂O₃ is the prototypical linear ME material, in which an electric (magnetic) field induces a linearly proportional magnetization (polarization), and a single magnetic domain can be selected by annealing in combined magnetic (H) and electric (E) fields. Opposite antiferromagnetic domains have opposite ME responses, and which antiferromagnetic domain corresponds to which sign of response has previously been unclear. We use density functional theory (DFT) to calculate the magnetic response of a single antiferromagnetic domain of Cr₂O₃ to an applied in-plane electric field at 0 K. We find that the domain with nearest neighbor magnetic moments oriented away from (towards) each other has a negative (positive) in-plane ME coefficient, α⊥, at 0 K. We show that this sign is consistent with all other DFT calculations in the literature that specified the domain orientation, independent of the choice of DFT code or functional, the method used to apply the field, and whether the direct (magnetic field) or inverse (electric field) ME response was calculated. Next, we reanalyze our previously published spherical neutron polarimetry data to determine the antiferromagnetic domain produced by annealing in combined E and H fields oriented along the crystallographic symmetry axis at room temperature. We find that the antiferromagnetic domain with nearest-neighbor magnetic moments oriented away from (towards) each other is produced by annealing in (anti-)parallel E and H fields, corresponding to a positive (negative) axial ME coefficient, α∥, at room temperature. Since α⊥ at 0 K and α∥ at room temperature are known to be of opposite sign, our computational and experimental results are consistent. This dataset contains the input data to reproduce the calculation of the magnetoelectric effect as plotted in Fig. 3 of the manuscript, for Elk, Vasp, and Quantum Espresso.
Authors Eric Bousquet
Eddy Lelièvre-Berna
Navid Qureshi
Jian-Rui Soh
Nicola Ann Spaldin
Andrea Urru
Xanthe Henderike Verbeek
Sophie Francis Weber
DOI None

Cite as: Bousquet, E., Lelièvre-Berna, E., Qureshi, N., Soh, J., Spaldin, N. A., Urru, A., Verbeek, X. H., and Weber, S. F. "linear magnetic coefficient in Cr2O3 JPCM2024." ColabFit, 2023.
For other citation formats, see the DataCite Fabrica page for this dataset.
Elements Cr (40.0%)
O (60.0%)
Number of Data Objects 210
Number of Configurations 165
Number of Atoms 1,650
Configuration Sets by Name linear_magnetic_coefficient_in_Cr2O3_JPCM2024_phonon_calculation — Configurations from linear_magnetic_coefficient_in_Cr2O3_JPCM2024 phonon calculations
linear_magnetic_coefficient_in_Cr2O3_JPCM2024_structural_relaxation — Configurations from linear_magnetic_coefficient_in_Cr2O3_JPCM2024 structural relaxations
linear_magnetic_coefficient_in_Cr2O3_JPCM2024_induced_magnetic_moments — Configurations from linear_magnetic_coefficient_in_Cr2O3_JPCM2024 induced magnetic moment calculations
linear_magnetic_coefficient_in_Cr2O3_JPCM2024_born_effective_charges — Configurations from linear_magnetic_coefficient_in_Cr2O3_JPCM2024 born effective charge calculations
Configuration Sets by ID CS_r012fj7kg6ga_0
Data Objects
ColabFit ID DS_82x5bfiiyaij_0
Files colabfitspec.json

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