Abstract
Thin film nanocomposites composed by CoFe2O4 grains, deposited by electrophoresis, and subsequently covered by a laser ablation deposited BaTiO3 layer, were prepared with different cobalt ferrite concentrations (x). The cobalt ferrite phase was under a compressive strain that relaxed as the CoFe2O4 concentration increased. Consequently, a blueshift of the Raman peaks of CoFe2O4 was observed, that decreased with increasing x. The dielectric permittivity of the films was found to decrease with increasing cobalt ferrite concentration, due to the decrease of the barium titanate layer grain size with increasing CoFe2O4 content in the films.
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