Large Magnetoelectric Coupling in the Thin Film of Multiferroic CuO.

We report observation of large magnetoelectric coupling in an epitaxial thin film of multiferroic CuO grown on the (100)MgO substrate by the pulsed laser deposition technique. The film is characterized by X-ray diffraction, transmission electron microscopy, and Raman spectrometry. The crystallographic structure of the film turns out to be monoclinic (space group 2/) with [111]CuO||[100]MgO "out-of-plane" epitaxy and "in-plane" domain structure.