Interface induced giant magnetoelectric coupling in multiferroic superlattices

Abstract

The electric and magnetic properties of (BaTiO${}_3$)${}_n$/(CaMnO${}_3$)${}_n$ short-period superlattices are studied by the first-principles calculations. The local electric polarizations in the CaMnO${}_3$ layers are significant, comparable to that in the BaTiO${}_3$ layers. Remarkably, the electric polarization is almost doubled when the spin configuration changes from antiferromagnetic to ferromagnetic in the superlattices, indicating a giant magnetoelectric coupling. This enhancement of the magnetoelectric coupling is due to the suppression of the antiferrodistortive mode in the CaMnO${}_3$ layers at the interfaces.

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Cited by in corpus (2)

• Epitaxial strain effects on magnetic ordering and spin-phonon couplings in the (SrMnO${}_3$)${}_1$/(LaMnO${}_3$)${}_1$ superlattice from first principles
• Electronic origin of spin-phonon coupling effect in transition-metal perovskites