Electrophoretic Deposition of CoFe2O4 Nanograins Dispersed in a Laser Ablated BaTiO3 Matrix

Thin film nanocomposites composed by CoFe 2 O 4 grains, deposited by electrophoresis, and subsequently covered by a laser ablation deposited BaTiO 3 layer, were prepared with different cobalt ferrite concentrations (x). The cobalt ferrite phase was under a compressive strain that relaxed as the CoFe...

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Bibliographic Details
Published in:Ferroelectrics 2011-01, Vol.421 (1), p.66-71
Main Authors: Barbosa, J. G., Pereira, M. R., Moura, C., Mendes, J. A., Almeida, B. G.
Format: Article
Language:English
Subjects:
BaTiO
CoFe
dielectric properties
Electrophoresis
Laser ablation
Multiferroic composites
Science & Technology
structure
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Summary:Thin film nanocomposites composed by CoFe 2 O 4 grains, deposited by electrophoresis, and subsequently covered by a laser ablation deposited BaTiO 3 layer, were prepared with different cobalt ferrite concentrations (x). The cobalt ferrite phase was under a compressive strain that relaxed as the CoFe 2 O 4 concentration increased. Consequently, a blueshift of the Raman peaks of CoFe 2 O 4 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 CoFe 2 O 4 content in the films.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2011.594344