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Title: Pressure-Induced Crossover from Long- to Short-Range Order in Compositionally Disordered Soft Mode Ferroelectrics

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.}

Authors:
 [1]
  1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
Publication Date:
Research Org.:
Sandia National Laboratory
OSTI Identifier:
286396
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 77; Journal Issue: 2; Other Information: PBD: Jul 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FERROELECTRIC MATERIALS; PHASE TRANSFORMATIONS; PZT; PRESSURE DEPENDENCE; ORDER PARAMETERS; CHEMICAL COMPOSITION; PHONONS; DIELECTRIC PROPERTIES; FREQUENCY DEPENDENCE; TEMPERATURE DEPENDENCE; DIELECTRIC CONSTANTS

Citation Formats

Samara, G A. Pressure-Induced Crossover from Long- to Short-Range Order in Compositionally Disordered Soft Mode Ferroelectrics. United States: N. p., 1996. Web. doi:10.1103/PhysRevLett.77.314.
Samara, G A. Pressure-Induced Crossover from Long- to Short-Range Order in Compositionally Disordered Soft Mode Ferroelectrics. United States. doi:10.1103/PhysRevLett.77.314.
Samara, G A. Mon . "Pressure-Induced Crossover from Long- to Short-Range Order in Compositionally Disordered Soft Mode Ferroelectrics". United States. doi:10.1103/PhysRevLett.77.314.
@article{osti_286396,
title = {Pressure-Induced Crossover from Long- to Short-Range Order in Compositionally Disordered Soft Mode Ferroelectrics},
author = {Samara, G A},
abstractNote = {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.}},
doi = {10.1103/PhysRevLett.77.314},
journal = {Physical Review Letters},
number = 2,
volume = 77,
place = {United States},
year = {1996},
month = {7}
}