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Electron Microscopic Study of Domains in Relaxor Ferroelectrics

Published online by Cambridge University Press:  25 February 2011

Marc de Graef ,
J.S. Speck ,
D.R. Clarke  and
D. Dimos
Marc de Graef
Affiliation:
Materials Department, University of California at Santa Barbara, CA 93106
J.S. Speck
Affiliation:
Materials Department, University of California at Santa Barbara, CA 93106
D.R. Clarke
Affiliation:
Materials Department, University of California at Santa Barbara, CA 93106
D. Dimos
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
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Abstract

The ferroelectric and antiferroelectric displacements in perovskite-based ceramics give rise to a wide range of domain structures. This paper reports on transmission electron microscopy observations as a function of temperature of such structures in PLZT and PLSnZT. In the PLZT system superposition of the diffraction patterns from modulated domains of low symmetry give rise to patterns with an apparent high symmetry. The ½(hkl)-type reflections become more intense with decreasing temperature and split into diffuse rods at high temperature. In the PLSnZT system a hierarchy of domain structures is observed with length scales ranging from unit cell dimensions to the full grain size. A temperature dependent long-period modulation along the < 110 > directions is observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 243: Symposium G – Ferroelectric Thin Films II , 1991 , 3
Copyright
Copyright © Materials Research Society 1992

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