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Orientation-Dependent Dielectric Anomalies in Relaxor-Based Crystal (PbMg1/3Nb2/3O3)0.68(PbTiO3)0.32 (PMN-32%PT)

Published online by Cambridge University Press:  01 February 2011

Chi-Shun Tu  and
V. Hugo Schmidt
Chi-Shun Tu
Affiliation:
Department of Physics, Fu Jen University, Taipei 242, Taiwan
V. Hugo Schmidt
Affiliation:
Department of Physics, Montana State University, Bozeman, MT 59717, U.S.A.
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Abstract

Dielectric permittivities and polarization-electric-field (P-E) hysteresis loops have been measured as a function of temperature in relaxor-based ferroelectric single crystals (PbMg1/3Nb2/3O3)0.68(PbTiO3)0.32 (PMN-32%PT) for <110>cub and <211>cub orientations. Contrary to the pure PbMg1/3Nb2/3O3 (PMN), PMN-32%PT exhibits apparent orientation dependences of dielectric permittivities, polarizations, and phase transitions. With a prior fieldcooled treatment, a field-induced state, perhaps of orthorhombic symmetry, is evidenced and coexists with the rhombohedral symmetry in the low-temperature region. This field-induced phase is manifested by an extra dielectric peak observed near 373 K for the <211>cub orientation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 718: Symposium D – Perovskite Materials , 2002 , D10.23
Copyright
Copyright © Materials Research Society 2002

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