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Ferroelectric and Magnetic Characterization of Ferroic Pb(Fe0.5Nb0.5)O3 Ceramics

Published online by Cambridge University Press:  26 February 2011

Oscar Raymond ,
Reynaldo Font ,
Guillermo Alvarez ,
Jorge Portelles ,
Gopalan Srinivasan  and
Jesús M. Siqueiros
Oscar Raymond
Affiliation:
[email protected], Centro de Ciencias de la Materia Condensada-Universidad Nacional Autónoma de México, Propiedades Opticas, Km 107, Carretera Tijuana-Ensenada, Ensenada, Baja California, 22860, Mexico, +52 646 174 46 02, +52 646 174 46 03
Reynaldo Font
Affiliation:
[email protected], Universidad de la Habana, Facultad de Física, San Lázaro y L, Vedado, La Habana, 10400, Cuba
Guillermo Alvarez
Affiliation:
[email protected], Instituto de Investigaciones en Materiales-Universidad Nacional Autónoma de México, Av. Universidad, Cd. Universitaria, Col. Copilco el Alto, Del. Coyoacan, Distrito Federal, 04510, Mexico
Jorge Portelles
Affiliation:
[email protected], Universidad de la Habana, Facultad de Física, San Lázaro y L, Vedado, La Habana, 10400, Cuba
Gopalan Srinivasan
Affiliation:
[email protected], Oakland University, Physics Department, Rochester, MI, 48309-4401, United States
Jesús M. Siqueiros
Affiliation:
[email protected], Centro de Ciencias de la Materia Condensada-Universidad Nacional Autónoma de México, Propiedades Opticas, Km 107, Carretera Tijuana-Ensenada, Ensenada, Baja California, 22860, Mexico, +52 646 174 46 02, +52 646 174 46 03
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Abstract

Single phase multifunctional materials such as Pb(Fe0.5 Nb0.5)O3 (PFN), where ferroelectric and magnetic order coexist, are very promising and have great interest from the academic and technological points of view. PFN ceramics have been prepared from different kinds of FeNbO4 precursors with either monoclinic or orthorhombic structures. Crystallographic, compositional and surface morphological studies and the temperature-frequency response carried out and reported in previous works are summarized. Ferroelectric hysteretic, magnetic and magnetoelectric behaviors were measured. The remanent polarization (Pr) and coercive field (EC) as functions of temperature and external electric fields (Eext) were determined. Measurements of magnetic susceptibility (χm) exhibited antiferromagnetic order and, above the Núel point near 122 °K, Curie–Weis behavior; whereas a weak ferromagnetic observed from electron paramagnetic resonance (EPR) is discussed. However, magnetoelectric effects were not observed. Ferroelectric and magnetic behaviors, as functions of the kind of precursor used in the preparation, are discussed and correlated with the previous dielectric characterization where microstructural and equivalent circuit models were established using the impedance spectroscopy technique.

Keywords

ferroelectricmagnetic propertiesdielectric properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 966: Symposium T – Ferroelectrics and Multiferroics , 2006 , 0966-T03-05
Copyright
Copyright © Materials Research Society 2007

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