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Integrated Ferroelectrics
An International Journal
Volume 166, 2015 - Issue 1: Special Issue on Emerging Multifunctional and Bio-Inspired Materials
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Original Articles

Phase Transition Characteristics in A-Site La3+ Modified Bi-Layered Aurivillius-Type Structure SrBi2Nb2O9 Ferroelectric Ceramics

J. D. S. GuerraMultifunctional Electronic Materials and Devices Research Lab, Department of Electrical and Computer Engineering, College of Engineering, The University of Texas at San Antonio, San Antonio, TX78249, USA;Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, 38400-902Uberlândia–MG, BrazilCorrespondence[email protected] [email protected]
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I. C. ReisGrupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, 38400-902Uberlândia–MG, Brazil;Departamento de Física e Química, Universidade Estadual Paulista,, 15385-000. Ilha Solteira–SP, Brazil
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A. C. SilvaGrupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, 38400-902Uberlândia–MG, Brazil;Departamento de Física e Química, Universidade Estadual Paulista,, 15385-000. Ilha Solteira–SP, Brazil
,
E. B. AraújoDepartamento de Física e Química, Universidade Estadual Paulista,, 15385-000. Ilha Solteira–SP, Brazil
,
R. GuoMultifunctional Electronic Materials and Devices Research Lab, Department of Electrical and Computer Engineering, College of Engineering, The University of Texas at San Antonio, San Antonio, TX78249, USA
&
A. S. BhallaMultifunctional Electronic Materials and Devices Research Lab, Department of Electrical and Computer Engineering, College of Engineering, The University of Texas at San Antonio, San Antonio, TX78249, USA
Pages 150-157 | Accepted 13 Jun 2015, Published online: 15 Dec 2015
 
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Abstract

The phase transition characteristics have been investigated in lanthanum modified bismuth layer structured SrBi2Nb2O9 (SBN) ferroelectric ceramics, obtained from the conventional sintering method. In particular, structural, ferroelectric and dielectric properties have been analyzed taking into account the influence of the lanthanum content. Results of Raman spectroscopy as well as dielectric response suggested an evolution from normal ferroelectric-paraelectric phase transition to a relaxor-like behavior of the SLBN system, with the increase of the lanthanum concentration. The compositional cationic disorder has been considered as the main cause for the observed behavior, affecting the evolution of the long-rage polar ordering in the studied system.

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