We investigate the electronic structure and the ferroelectric properties of the recently discovered multiferroic ScFeO3 by means of ab initio calculations. The 3d manifold of Fe in the half-filled configuration naturally favors an antiferromagnetic ordering, with a theoretical estimate of the antiferromagnetic Ne ́el temperature in good agreement with the experimental values. We find that the inversion symmetry breaking is driven by the off-centering of Sc atoms, which results in a large ferroelectric polarization of ∼105 μC/cm2. Surprisingly the ferroelectric polarization is sensitive to the local magnetization of the Fe atoms resulting in a large negative magnetoelectric interaction. This behavior is unexpected in type-I multiferroic materials because the magnetic and ferroelectric orders are of different origins.

Magnetoelectric coupling in the type-I multiferroic ScFeO3

Capone, Massimo
2016

Abstract

We investigate the electronic structure and the ferroelectric properties of the recently discovered multiferroic ScFeO3 by means of ab initio calculations. The 3d manifold of Fe in the half-filled configuration naturally favors an antiferromagnetic ordering, with a theoretical estimate of the antiferromagnetic Ne ́el temperature in good agreement with the experimental values. We find that the inversion symmetry breaking is driven by the off-centering of Sc atoms, which results in a large ferroelectric polarization of ∼105 μC/cm2. Surprisingly the ferroelectric polarization is sensitive to the local magnetization of the Fe atoms resulting in a large negative magnetoelectric interaction. This behavior is unexpected in type-I multiferroic materials because the magnetic and ferroelectric orders are of different origins.
94
19
1
5
195116
https://journals.aps.org/prb/pdf/10.1103/PhysRevB.94.195116
https://arxiv.org/abs/1611.01762
Giovannetti, G.; Puggioni, D.; Barone, P.; Picozzi, S.; Rondinelli, J. M.; Capone, Massimo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/50418
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