Magnetically driven ferroelectric order in Ni3V2O8.
Gavin Lawes,A. B. Harris,Tsuyoshi Kimura,N. Rogado,Robert J. Cava,Amnon Aharony,Ora Entin-Wohlman,Taner Yildirim,Michel Kenzelmann,Michel Kenzelmann,Collin Broholm,Collin Broholm,Arthur P. Ramirez,Arthur P. Ramirez +13 more
TLDR
This phenomenological theory explains the experimental observation that the spontaneous polarization is restricted to lie along the crystal b axis and predicts that the magnitude should be proportional to a magnetic order parameter.Abstract:
We show that long-range ferroelectric and incommensurate magnetic order appear simultaneously in a single phase transition in Ni3V2O8. The temperature and magnetic-field dependence of the spontaneous polarization show a strong coupling between magnetic and ferroelectric orders. We determine the magnetic symmetry using Landau theory for continuous phase transitions, which shows that the spin structure alone can break spatial inversion symmetry leading to ferroelectric order. This phenomenological theory explains our experimental observation that the spontaneous polarization is restricted to lie along the crystal b axis and predicts that the magnitude should be proportional to a magnetic order parameter.read more
Citations
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References
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TL;DR: In this paper, the authors reviewed the domain aspects of multi-ferroics, i.e. of materials, in which two or all three properties of the properties "ferroelectricity" and "ferromagnetism" occur simultaneously in the same phase, and in which the magnetic point group has been reliably established by magnetoelectric, optical, dielectric and related studies on single crystals and single domains.
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REVIEWS OF TOPICAL PROBLEMS: Ferroelectromagnets
G. A. Smolenskiĭ,I. E. Chupis +1 more
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Ferroelectricity and Giant Magnetocapacitance in Perovskite Rare-Earth Manganites
TL;DR: The relationships among magnetism, lattice modulation, and dielectric properties have been investigated for RMnO3 and it was found that the IC-C transition is accompanied by a ferroelectric transition, associated with a lattices modulation in the C phase.
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Magnetic phase control by an electric field
TL;DR: A system whose magnetic phase can be controlled by an external electric field is reported: ferromagnetic ordering in hexagonal HoMnO3 is reversibly switched on and off by the applied field via magnetoelectric interactions.