  We study composites of monodisperse ferrimagnetic nanoparticles (NPs)
embedded into ferroelectric barium titanate (BTO) films. The BTO films were
prepared by pulsed laser deposition. The composite consists of a stack of two
BTO films sandwiching one monolayer of iron oxide NPs. We observe a
magnetoelectric coupling due to strain and interface charge co-mediation
between the BTO and the NPs. This is demonstrated by measurements of the
magnetization as function of DC and AC electric fields.
