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Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites

I. A. Sergienko·E. Dagotto
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Abstract

With the perovskite multiferroic RMnO3 (R = Gd, Tb, Dy) as guidance, we argue that the Dzyaloshinskii-Moriya interaction (DMI) provides the microscopic mechanism for the coexistence and strong coupling between ferroelectricity and incommensurate magnetism. We use Monte-Carlo simulations and zero temperature exact calculations to study a model incorporating the double-exchange, superexchange, Jahn-Teller and DMI terms. The phase diagram contains a multiferroic phase between A and E antiferromagnetic phases, in excellent agreement with experiments.

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I. A. Sergienko, E. Dagotto. 2006-02-24. Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites. https://doi.org/10.1103/physrevb.73.094434

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