Ferroelectricity driven by the non-centrosymmetric magnetic ordering in multiferroic TbMn_2O_5: a first-principles study

Abstract

The ground state structural, electronic and magnetic properties of multiferroic TbMn${}_2$O${}_5$ are investigated via first-principles calculations. We show that the ferroelectricity in TbMn${}_2$O${}_5$ is driven by the non-centrosymmetric magnetic ordering, without invoking the spin-orbit coupling and non-collinear spins. The {\it intrinsic} electric polarization in this compound is calculated to be 1187 $nC\cdot$ cm${}^{-2}$, an order of magnitude larger than previously thought.

References in corpus (3)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• IR Phonon signatures of multiferroicity in TbMn${}_2$O${}_5$

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• Crystal chemistry aspects of the magnetically induced ferroelectricity in TbMn2O5 and BiMn2O5
• Magnetoelastic and thermal effects in the BiMn2O5 lattice: a high-resolution x-ray diffraction study
• Order Parameters and Phase Diagram of Multiferroic RMn${}_2$O${}_5$
• Structural distortion and frustrated magnetic interactions in the layered copper oxychloride [CuCl]LaNb(2)O(7)
• Order Parameters and Phase Diagrams of Multiferroics
• First-principles study of the spin-lattice coulpling in spin frustrated DyMn${}_2$O${}_5$
• Theory of magnetic field-induced metaelectric critical end point in BiMn${}_2$O${}_5$