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Integrated Ferroelectrics
An International Journal
Volume 174, 2016 - Issue 1: The Second Special Issue on Emerging Multifunctional and Bio-Inspired Materials
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Original Articles

Ferroic properties of 0.675[Pb(Mg1/3Nb2/3)O3]−0.325[PbTiO3]/CoFe2O4 prepared by spark plasma sintering

D. S. F. VianaPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil;Multifunctional Electronic Materials and Devices Research Lab, College of Engineering, University of Texas at San Antonio, San Antonio, TX, USACorrespondence[email protected]
,
F. P. MiltonPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil
,
K. R. C. P. JimenezPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil
,
A. J. GualdiPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil
,
P. C. CamargoPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil
,
A. J. A. de OliveiraPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil
,
J. A. EirasPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil
,
A. BhallaMultifunctional Electronic Materials and Devices Research Lab, College of Engineering, University of Texas at San Antonio, San Antonio, TX, USA
,
R. GuoMultifunctional Electronic Materials and Devices Research Lab, College of Engineering, University of Texas at San Antonio, San Antonio, TX, USA
&
D. GarciaPhysics Department, Federal University of São Carlos, São Carlos, SP, Brazil
 show all
Pages 138-145 | Accepted 15 Jan 2016, Published online: 13 Jul 2016
 
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ABSTRACT

This paper reports the electric, magnetic and magnetoelectric properties of particulate composites of the system with ferroelectric phase 0.675[Pb(Mg1/3Nb2/3)O3]−0.325[PbTiO3] and magnetic phase CoFe2O4 prepared by Spark Plasma Sintering technique. Optimized sintering and thermal annealing parameters were applied in order to achieve highly dense microstructure with sub micrometric grain size distribution for both phases. The results from the dielectric measurements showed a diffuse and dispersive phase transition. P-E and M-H loops revealed the simultaneous existence of ferroelectric and ferrimagnetic ordering, respectively. Moreover, at cryogenic temperatures an anomalous behavior on the bias magnetic field dependence was observed for the magnetoelectric voltage coefficient.

Acknowledgements

To Mr. Francisco J. Picon (GCFerr), Mrs. Natália Ap. Zanardi (DF-UFSCar) and Mr. José A. L. da Rocha (IFSC-USP) for technical support. To Prof. Dr. Yvonne P. Mascarenhas (Crystallography Group of the IFSC-USP) for the access to the X Ray Diffraction facilities. To FAPESP (Proc. n. 2008/04025-0) and CAPES for the financial support. Authors also acknowledge the support of INAMM/NSF,the UTSA and W911NF-12-1-0082 grants.

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