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Author Samara, G. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ FERROELECTRIC MATERIALS ♦ PHASE TRANSFORMATIONS ♦ PZT ♦ PRESSURE DEPENDENCE ♦ ORDER PARAMETERS ♦ CHEMICAL COMPOSITION ♦ PHONONS ♦ DIELECTRIC PROPERTIES ♦ FREQUENCY DEPENDENCE ♦ TEMPERATURE DEPENDENCE ♦ DIELECTRIC CONSTANTS
Abstract Results on a lanthanum-modified, lead zirconate-titanate have revealed (1) pressure-induced crossover from normal ferroelectric- (nFE-) to-relaxor (R) behavior; (2) the continuous evolution of the dynamics of the relaxation process; (3) a spontaneous R-to-nFE transition at a temperature well below the dynamic glass temperature of the R phase; and (4) the vanishing of this transition with pressure at a critical point. These results can be understood in terms of a large decrease in the correlation radius among polar nanodomains{emdash}a unique property of soft ferroelectric phonon mode systems. {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-07-01
Publisher Department Sandia National Laboratory
Publisher Place United States
Journal Physical Review Letters
Volume Number 77
Issue Number 2
Organization Sandia National Laboratory


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