  We present an experimental study of the magnetoelectric coupling (MEC) in the
Fe-Ga/PMN-PT thin film multiferroic composite by means of x-ray magnetic
circular dichroism (XMCD) and ferromagnetic resonance (FMR). Our measurements
show evidence for a charge mediated coupling mechanism, suggested by the
asymmetric magnetic remanence (M$_{rem}$) behaviour under opposite electric
fields ($\pm$ E) and the asymmetric resonance field (H$_r$) in the FMR
measurements. Also, the FMR measurements reveal a perpendicular magnetic
anisotropy (PMA), that can be related to an interface charge effect. and it is
tunable by E field. Ab initio calculations support the existence of a charge
mediated coupling at the Fe-Ga/PMN-PT interface.
