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Study of A and B sites order in lanthanide-doped lead titanate ferroelectric system

Published online by Cambridge University Press:  17 February 2016

A. Pentón-Madrigal ,
Y. Mendez-González ,
A. Peláiz-Barranco ,
F. Calderón-Piñar ,
L. A. S. de Oliveira ,
J. Belhadi  and
Y. Gagou
A. Pentón-Madrigal*
Affiliation:
Facultad de Física-Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, San Lázaro y L, Vedado, La Habana 10400, Cuba
Y. Mendez-González
Affiliation:
Facultad de Física-Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, San Lázaro y L, Vedado, La Habana 10400, Cuba
A. Peláiz-Barranco
Affiliation:
Facultad de Física-Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, San Lázaro y L, Vedado, La Habana 10400, Cuba
F. Calderón-Piñar
Affiliation:
Facultad de Física-Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, San Lázaro y L, Vedado, La Habana 10400, Cuba
L. A. S. de Oliveira
Affiliation:
NUMPEX – Núcleo Multidisciplinar de Pesquisas, Universidade Federal do Rio de Janeiro, Est. De Xerém 27, 25245-390 Duque de Caxias, RJ, Brazil
J. Belhadi
Affiliation:
University of Picardie Jules Verne, LPMC, 80039 Amiens Cedex, France
Y. Gagou
Affiliation:
University of Picardie Jules Verne, LPMC, 80039 Amiens Cedex, France
*
a) Author to whom correspondence should be addressed. Electronic mail: arbelio@fisica.uh.cu, arbelio_1999@yahoo.com
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Abstract

Pb0.88 Ln 0.08TiO3 ferroelectric system, where Ln = La, Sm, Eu, and Dy, has been characterized using Scanning Electron Microscopy, Raman spectroscopy, and X-ray diffraction experiments. Softening of the lowest transverse optical phonon mode E (1TO) was evaluated as a function of the rare earths’ ionic radius suggesting partial occupation of lanthanide ions at the A and B sites of the perovskite structure. Using Rietveld refinements, it has been established a higher incorporation of Ln3+ ions into the A sites of the perovskite structure than that of the B sites for the studied ceramics. The occupation at B sites increases slightly with the decreases of the ionic radii of the lanthanides.

Keywords

PLZTX-Ray diffractionRaman spectroscopycrystal structureferroelectricity
Type
Technical Articles
Information
Powder Diffraction , Volume 31 , Issue 1 , March 2016 , pp. 23 - 30
Copyright
Copyright © International Centre for Diffraction Data 2016 

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