Directional magnetoelectric effects in MnWO4: magnetic sources of the electric polarization

Details Directional magnetoelectric effects in MnWO4: magnetic sources of the electric polarization Directional magnetoelectric effects in MnWO4: magnetic sources of the electric polarization

2010-01-22

arxiv.org/abs/1001.4005v1

J. Phys.: Condens. Matter 22, 065901 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1088/0953-8984/22/6/065901

The ferroelectric order and magnetic field induced effects observed in the spiral phase of MnWO4 are described theoretically. It is demonstrated explicitly that the Dzyaloshinskii-Moriya antisymmetric interactions contribute to the correlation between spins and electric dipoles in the incommensurate and commensurate ferroelectric phases of magnetic multiferroics. However, other single-site symmetric interactions are shown to be involved in the magnetoelectric process, suggesting the possible existence of an electric polarization originating from purely symmetric effects.

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