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Electromechanical anisotropy behavior in Pb0.88Eu0.08Ti1−yMnyO3 system: Role of 90° domain reversal

Published online by Cambridge University Press:  31 January 2011

O. Pérez Martínez ,
J. M. Saniger Blesa ,
A. Peláiz Barranco  and
F. Calderón Piñar
O. Pérez Martínez*
Affiliation:
Departamento de Ingenieria Metalurgia y de Materiales, Universidad de Antioquia, Apartado Aéreo: 1226-Postal: 229-Ciudad Universitaria-Medellin, Colombia
J. M. Saniger Blesa
Affiliation:
Centro de Instrumentos, AP. 70-186 México 04510, Universidad Nacional Autónoma de México, México
A. Peláiz Barranco
Affiliation:
Facultad de Fisica, Instituto de Materiales y Reactivos para la Electrónica, Universidad de la Habana, San Lázaro y L, Vedado, La Habana 10400, Cuba
F. Calderón Piñar
Affiliation:
Facultad de Fisica, Instituto de Materiales y Reactivos para la Electrónica, Universidad de la Habana, San Lázaro y L, Vedado, La Habana 10400, Cuba
*
a) Address all correspondence to this author at Departamento de Ingeniería Metalurgia y de Materiales, Universidad de Antioquia, calle 67, 53-108, Bloque 18 of 240, Ciudad Universitaria-Medellin, Colombia.
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Abstract

An indirect observation of 90° domain reversal under the influence of a poling field process was undertaken by an x-ray diffraction study in the Pb0.88Eu0.08Ti1™y MnyO3 (y = 0, 0.01, 0.02, and 0.03) piezoelectric anisotropic system. The optimum condition kp → 0 was achieved for y = 0.02 composition. A large percentage of 90° domain rotation was necessary, but not a sufficient condition for the ultrahigh electromechanical anisotropy manifestation. A large microstrain originated by structural defects in unpoled samples seemed to play a crucial role in the attainment of this piezoelectric anisotropy. A breaking in the translational periodicity due to induced vacancy in Pb and O sites by Eu3+ and Mn2+ substitutions was manifested in the nonuniform variance of the tetragonality (c/a), the large microstrain, and the detriment of crystallinity observed.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 7 , July 1999 , pp. 3083 - 3089
Copyright
Copyright © Materials Research Society 1999

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