First-principles theory of magnetically induced ferroelectricity in TbMnO3

Abstract

We study the polarization induced via spin-orbit interaction by a magnetic cycloidal order in orthorhombic TbMnO3 using first-principle methods. The case of magnetic spiral lying in the b-c plane is analyzed, in which the pure electronic contribution to the polarization is shown to be small. We focus our attention on the lattice-mediated contribution, and study it's dependence on the Coulomb interaction parameter U in the LDA+U method and on the wave-vector of the spin spiral. The role of the spin-orbit interaction on different sites is also analyzed.

4 pages, 2 figures, submitted to EPJ B (MEIPIC6 proceedings)

References in corpus (5)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Magnetically driven ferroelectric order in Ni${}_3$V${}_2$O${}_8$
• Spin-Orbit Coupling and Ion Displacements in Multiferroic TbMnO3
• Relationship between ferroelectricity and Dzyaloshinskii-Moriya interaction in multiferroics and the effect of bond-bending

Cited by in corpus (4)

• Dependence of electronic polarization on octahedral rotations in TbMnO3 from first principles
• Dopant-mediated structural and magnetic properties of TbMnO3
• Novel magneto-electric multiferroics from first-principles
• Spin-wave dispersion and magnon chirality in multiferroic TbMnO3