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Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites

I. A. Sergienko·C. Sen·E. Dagotto
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Abstract

We show that the symmetry of the spin zigzag chain E phase of the orthorhombic perovskite manganites and nickelates allows for the existence of a finite ferroelectric polarization. The proposed microscopic mechanism is independent of spin-orbit coupling. We predict that the polarization induced by the E-type magnetic order can potentially be enhanced by up to two orders of magnitude with respect to that in the spiral magnetic phases of TbMnO3 and similar multiferroic compounds.

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I. A. Sergienko, C. Sen, E. Dagotto. 2006-10-27. Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites. https://doi.org/10.1103/physrevlett.97.227204

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