Structural, ferroelectric, dielectric, and magnetic propertiesof BiFeO 3 / Bi 3.15 Nd 0.85 Ti 3 O 12 multilayer films derived by chemicalsolution deposition

BiFeO 3 / Bi 3.15 Nd 0.85 Ti 3 O 12 (BFO/BNdT) multilayer films have been grown on Pt-coated silicon substrate by chemical solution deposition. Using Bi 3.15 Nd 0.85 Ti 3 O 12 as an inducing layer, ferroelectric properties of BiFeO 3 were enhanced significantly. The 2 P r and coercive electric field of the Pt/BFO/BNdT/Pt capacitor were about 22.1 μ C / cm 2 and 50 kV/cm, respectively. The dielectric constant and the dissipation factor of the multilayer were 373 and 0.05 measured at 10 5 Hz , respectively. The multilayer capacitors not only exhibited excellent fatigue resistance without polarization reduction after 10 10 switching cycles but also showed lower leakage current density (around the order of 10 − 9 - 10 − 7 A / cm 2 ) and negligible data loss due to imprint. The magnetic hysteresis indicated that the multiplayer was antiferromagnetic and the saturated magnetization was about 2.47 emu / cm 3 .