Electric field control of chiral magnetic domains in the   high-temperature multiferroic CuO
  We have studied the high temperature multiferroic cupric oxide using polarized neutron diffraction as a function of temperature and applied electric field. We find that the chiral domain population can be varied using an external electric field applied along the b axis. Using representation analysis we derive the incommensurate magnetic structure in the multiferroic phase. The origin of the magnetoelectric coupling is consistent with models based on the inverse Dzyaloshinskii-Moriya interaction, but is different from the simple cycloidal mechanism. 
P. Babkevich, A. Poole, R. D. Johnson, B. Roessli, D. Prabhakaran, A.   T. Boothroyd
cond-mat.str-el