Abstract
Multiferroic Gd, Mn co-doped BiFeO3 (BFO)/CoFe2O4 (CFO) heterostructure film has been deposited by the chemical solution deposition on a FTO/glass substrate. The influence of CoFe2O4 layer and (Gd, Mn) co-substitution on multiferroic properties of the heterostructure film was investigated. The XRD and SEM results reveal that the well double-layer heterostructure film is obtained. It is found that (Gd, Mn) co-substitution induces a structural transformation in the BFO layer. Compared with BFO/CFO, (Gd, Mn)-BFO/CFO film presents highly enhanced ferroelectric properties and dramatically reduced leakage current. In addition, the ferromagnetism of the (Gd, Mn)-BFO/CFO is dominated by the CFO layer, meanwhile the (Gd, Mn)-BFO layer also promotes the ferromagnetic properties of the heterostructure. The obtained Gd, Mn-BFO/CFO heterostructure film simultaneously exhibits remarkable ferroelectricity (2Pr∼165μC/cm2) and ferromagnetism (Mr∼55.0emu/cm3) at room temperature.
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