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The European Physical Journal B

, Volume 71, Issue 3, pp 345–348 | Cite as

First-principles theory of magnetically induced ferroelectricity in TbMnO3

  • A. Malashevich
  • D. Vanderbilt
Topical issue on Magnetoelectric Interaction Phenomena in Crystals

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.

PACS

75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction 77.80.-e Ferroelectricity and antiferroelectricity 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Department of Physics and AstronomyRutgers UniversityPiscatawayUSA

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