Symmetry of Multiferroicity in a Frustrated Magnet TbMn${}_2$O${}_5$

J. Okamoto, D. J. Huang, C. -Y. Mou +5

Based on measurements of soft x-ray magnetic scattering and symmetry considerations, we demonstrate that the magnetoelectric effect in TbMn${}_2$O${}_5$ arises from an internal field d…