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Title: Dielectric properties and phase transitions of [Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub 0.905}(PbTiO{sub 3}){sub 0.095}: Influence of pressure

Abstract

Studies of the influences of temperature, hydrostatic pressure, dc biasing field, and frequency on the dielectric constant ({epsilon}') and loss (tan{delta}) of single crystal [Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub 0.905}(PbTiO{sub 3}){sub 0.095}, or PZN-9.5 PT for short, have provided a detailed view of the ferroelectric (FE) response and phase transitions of this technologically important material. While at 1 bar, the crystal exhibits on cooling a cubic-to-tetragonal FE transition followed by a second transition to a rhombohedral phase, pressure induces a FE-to-relaxor crossover, the relaxor phase becoming the ground state at pressures {>=}5 kbar. Analogy with earlier results suggests that this crossover is a common feature of compositionally disordered soft mode ferroelectrics and can be understood in terms of a decrease in the correlation length among polar domains with increasing pressure. Application of a dc biasing electric field at 1 bar strengthens FE correlations, and can at high pressure restabilize the FE response. The temperature-pressure and temperature-electric field phase diagrams were established. In the absence of dc bias the tetragonal phase vanishes at high pressure, the crystal exhibiting classic relaxor behavior. The dynamics of dipolar motion and the strong deviation from Curie-Weiss behavior of the susceptibility in the high-temperature cubic phase aremore » discussed.« less

Authors:
; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40205584
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 63; Journal Issue: 18; Other Information: DOI: 10.1103/PhysRevB.63.184104; Othernumber: PRBMDO000063000018184104000001; 025118PRB; PBD: 1 May 2001; Journal ID: ISSN 0163-1829
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ELECTRIC FIELDS; GROUND STATES; HYDROSTATICS; MONOCRYSTALS; PHASE DIAGRAMS

Citation Formats

Samara, G A, Venturini, E L, and Schmidt, V Hugo. Dielectric properties and phase transitions of [Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub 0.905}(PbTiO{sub 3}){sub 0.095}: Influence of pressure. United States: N. p., 2001. Web. doi:10.1103/PhysRevB.63.184104.
Samara, G A, Venturini, E L, & Schmidt, V Hugo. Dielectric properties and phase transitions of [Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub 0.905}(PbTiO{sub 3}){sub 0.095}: Influence of pressure. United States. https://doi.org/10.1103/PhysRevB.63.184104
Samara, G A, Venturini, E L, and Schmidt, V Hugo. 2001. "Dielectric properties and phase transitions of [Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub 0.905}(PbTiO{sub 3}){sub 0.095}: Influence of pressure". United States. https://doi.org/10.1103/PhysRevB.63.184104.
@article{osti_40205584,
title = {Dielectric properties and phase transitions of [Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub 0.905}(PbTiO{sub 3}){sub 0.095}: Influence of pressure},
author = {Samara, G A and Venturini, E L and Schmidt, V Hugo},
abstractNote = {Studies of the influences of temperature, hydrostatic pressure, dc biasing field, and frequency on the dielectric constant ({epsilon}') and loss (tan{delta}) of single crystal [Pb(Zn{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub 0.905}(PbTiO{sub 3}){sub 0.095}, or PZN-9.5 PT for short, have provided a detailed view of the ferroelectric (FE) response and phase transitions of this technologically important material. While at 1 bar, the crystal exhibits on cooling a cubic-to-tetragonal FE transition followed by a second transition to a rhombohedral phase, pressure induces a FE-to-relaxor crossover, the relaxor phase becoming the ground state at pressures {>=}5 kbar. Analogy with earlier results suggests that this crossover is a common feature of compositionally disordered soft mode ferroelectrics and can be understood in terms of a decrease in the correlation length among polar domains with increasing pressure. Application of a dc biasing electric field at 1 bar strengthens FE correlations, and can at high pressure restabilize the FE response. The temperature-pressure and temperature-electric field phase diagrams were established. In the absence of dc bias the tetragonal phase vanishes at high pressure, the crystal exhibiting classic relaxor behavior. The dynamics of dipolar motion and the strong deviation from Curie-Weiss behavior of the susceptibility in the high-temperature cubic phase are discussed.},
doi = {10.1103/PhysRevB.63.184104},
url = {https://www.osti.gov/biblio/40205584}, journal = {Physical Review B},
issn = {0163-1829},
number = 18,
volume = 63,
place = {United States},
year = {2001},
month = {5}
}