Effects of Mg doping on multiferroic properties of bilayered Co1−xMgxFe2O4/PMN–PT composite thin films

Multiferroic Co1−xMgxFe2O4/0.68Pb(Mg1/3Nb2/3)O3–0.32PbTiO3 (CMFO/PMN–PT) bilayered thin films were prepared on Pt/Ti/SiO2/Si substrates by a simple sol–gel spin-coating technique. The effects of the Mg content on the electrical, magnetic, and magnetoelectric (ME) properties of the CMFO/PMN–PT bilayered thin films were investigated. It was found that increasing the Mg concentration could obviously improve the ME properties of the bilayered thin films. The results indicated the Mg doping provides an effective way to obtain the high ME response in the CFO/piezoelectric bilayered thin films.