Processing and magneto-electric properties of sol–gel-derived Pb(Zr0.52Ti0.48)O3–Ni0.8Zn0.2Fe2O4 2-2 type multilayered films
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Pb(Zr0.52Ti0.48)O3–Ni0.8Zn0.2Fe2O4 (PZT–NZFO) multilayered thin films with various volume fractions of the PZT phase (100, 74, 58, 48, 33, and 0%) were prepared on Pt/Ti/SiO2/Si substrates using sol–gel spin-coating method. X-ray diffraction shows polycrystalline structure and scanning electron microscopy reveals good multilayer morphology of the composite thin film as annealed at 700 °C in air. The thickness of the composite films was estimated in the range of ~400 to ~600 nm. The ferroelectric and magnetic properties were measured as function of the volume fractions of the PZT phase. The magnetoelectric (ME) effect was investigated under various bias magnetic fields. The maximum ME voltage coefficient (αE = dE/dH) is 278 mV/cmOe for the composite film with the volume fractions of the PZT phase of ~48%.
KeywordsFerrite Composite Film CoFe2O4 Multilayered Film Nickel Ferrite
This study was supported by the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 200803591037) and partially by the National Natural Science Foundation of China (50972035) and a Program for New Century Excellent Talents in University, State Education Ministry (NCET-08-0766).
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