Journal
MATERIALS RESEARCH BULLETIN
Volume 47, Issue 12, Pages 4240-4245Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2012.09.026
Keywords
Thin films; Chemical synthesis; Atomic force microscopy; Magnetic properties
Categories
Funding
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/71289/2010, SFRH/BPD/81032/2011]
- DoD, USA [W911NF-11-1-0204]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/71289/2010] Funding Source: FCT
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Piezoresponse Force Microscopy (PFM) technique has been employed to acquire out-of-plane (OPP) piezoresponse images and local piezoelectric hysteresis loop in rhombohedrally distorted Bi1-xPrxFe1-yCoyO3 [x = 0, 0.05; y = 0.05] polycrystalline thin films fabricated via chemical solution deposition method. PFM images revealed that piezoelectric contrast is dependent upon the film composition. Furthermore, negative self-polarization effect was observed in the cobalt substituted BFO film. Well saturated local piezo-hysteresis loops were monitored and an increase was noticed in the piezoelectric coefficient (d(33)) value with cobalt doping (25.1 pm/V) whereas with Pr co-substitution in BFCO film, the piezoelectric behavior was almost suppressed. Pr and cobalt co-substituted film exhibited the lowest leakage current density. Magnetic behavior (M-H curves) exhibited nearly eight times enhancement in the saturation magnetization values in the Co- and Co-Pr substituted films. The present study provides the different elements' substitution effect on the local piezoelectric and magnetic properties of BiFeO3 multiferroic thin film. (C) 2012 Elsevier Ltd. All rights reserved.
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