Femtoscale magnetically induced lattice distortions in multiferroic TbMnO3

摘要: Magneto-electric multiferroics exemplified by TbMnO3 possess both magnetic and ferroelectric long-range order. The order is mostly understood, whereas the nature of ferroelectricity has remained more elusive. Competing models proposed to explain are associated respectively with charge transfer ionic displacements. Exploiting magneto-electric coupling, we used an electric field produce a single domain state, induce Under these conditions, interference between x-ray scattering arose, encoding amplitude phase When combined theoretical analysis, our data allow us resolve displacements at femtoscale, show that such make substantial contribution zero-field moment.