The Magnetic Structure of DyMn2O5 Determined by Resonant X-ray   Scattering
  Resonant magnetic x-ray scattering has been used to investigate the magnetic structure of the magnetoelectric multiferroic DyMn2O5. We have studied the magnetic structure in the ferroelectric phase of this material, which displays the strongest ferroelectric polarisation and magnetodielectric effect of the RMn2O5 (where R is a rare earth ion, Y or Bi) family. The magnetic structure observed is similar to that of the other members of the series, but differs in the direction of the ordered moments. In DyMn2O5 both the Dy and Mn moments lie close to the b-axis, whereas in other RMn2O5 they lie close to the a-axis. 
G. E. Johnstone, R. A. Ewings, R. D. Johnson, C. Mazzoli, H. C. Walker   and A. T. Boothroyd
cond-mat.str-el cond-mat.mtrl-sci