Abstract
Bi(Fe1-xCox)O3 (BFCO) material and the composite based on doped Bi4Ti3O12/CoFe2O4 was synthesized by solution route for various compositions and films were deposited by spin coating on Pt substrate (Pt/Ti/SiO2/Si). Structural, ferroelectric, and ferromagnetic properties were investigated, respectively, using x-ray diffraction, Raman spectroscopy, VSM, and ferroelectric probe. X-ray diffraction patterns shows intense (110) peak of BFO in Bi(Fe1-xCox)O3 with space group R3c and distorted rhombohedral perovskite structure without impure phase. The ferromagnetic response (M - H) showed room temperature magnetization of ∼3 emu/cm3 and coercive field Hc ∼200 Oe for Bi(Fe0.98Co0.02)O3 films. The ferroelectrics response shows week remnant polarizations (Pr) = 0.4 μC cm−2 for Bi(Fe0.98Co0.02)O3 at room temperature, but saturation was not observed. The composite film of multilayer structures Bi3.5Nd0.5Ti3O12/CoFe2O4 shows composite phase, with considerable ferroelectric and ferromagnetic responses at room temperature.
Acknowledgment
This work was supported by DoE-EPSCoR Grant No. DE-SG02–08ER46526 and is gratefully appreciated.