Room temperature multiferroic properties of (Bi0.95La0.05)(Fe0.97Mn0.03)O3/NiFe2O4 double layered thin film

Abstract (Bi 0.95 La 0.05 )(Fe 0.97 Mn 0.03 )O 3 /NiFe 2 O 4 double layered thin film was prepared on a Pt(111)/Ti/SiO 2 /Si(100) substrate by a chemical solution deposition method. X-ray diffraction and Raman scattering spectroscopy studies confirmed the formation of the distorted rhombohedral perovskite and the inverse spinel cubic structures for the (Bi 0.95 La 0.05 )(Fe 0.97 Mn 0.03 )O 3 /NiFe 2 O 4 double layered thin film. The (Bi 0.95 La 0.05 )(Fe 0.97 Mn 0.03 )O 3 /NiFe 2 O 4 double layered thin film exhibited well saturated ferromagnetic (2 M r of 18.1 emu/cm 3 and 2 H c of 0.32 kOe at 20 kOe) and ferroelectric (2 P r of 60 μC/cm 2 and 2 E c of 813 kV/cm at 866 kV/cm) hysteresis loops with low order of leakage current density (4.5 × 10 −6 A/cm 2 at an applied electric field of 100 kV/cm), which suggest the ferroelectric and ferromagnetic multi-layers applications in real devices.