Applied Surface Science, Vol.257, No.15, 6573-6576, 2011
The ferroelectric and ferromagnetic characterization of CoFe2O4/Pb(Mg1/3Nb2/3)O-3-PbTiO3 multilayered thin films
The multiferroic (PMN-PT/CFO)(n) (n = 1,2) multilayered thin films have been prepared on SiO2/Si(1 0 0) substrate with LNO as buffer layer via a rf magnetron sputtering method. The structure and surface morphology of multilayered thin films were determined by X-ray diffraction (XRD) and atom force microscopy (AFM), respectively. The smooth, dense and crack-free surface shows the excellent crystal quality with root-mean-square (RMS) roughness only 2.9 nm, and average grain size of CFO thin films on the surface is about 44 nm. The influence of the thin films thickness size, periodicity n and crystallite orientation on their properties including ferroelectric, ferromagnetic properties in the (PMN-PT/CFO)(n) multilayered thin films were investigated. For multilayered thin films with n = 1 and n = 2, the remanent polarization Pr are 17.9 mu C/cm(2) and 9.9 mu C/cm(2); the coercivity H-c are 1044 Oe and 660 Oe, respectively. In addition, the relative mechanism are also discussed. (C) 2011 Elsevier B. V. All rights reserved.