Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites

被引：1244

作者：

Sergienko, IA

Dagotto, E

机构：

[1] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.73.094434

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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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页数：5

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