Role of random electric fields in relaxors

Daniel Phelan; Christopher Stock; Jose A. Rodriguez-Rivera; Songxue Chi; Juscelino Leao; Xifa Long; Yujuan Xie; Alexei A. Bokov; Zuo-Guang Ye; Panchapakesan Ganesh; Peter M. Gehring

doi:10.1073/pnas.1314780111

Role of random electric fields in relaxors

Daniel Phelan, Christopher Stock, Jose A. Rodriguez-Rivera, Songxue Chi, Juscelino Leao, Xifa Long, Yujuan Xie, Alexei A. Bokov, Zuo-Guang Ye, Panchapakesan Ganesh, Peter M. Gehring^*

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

PbZr_1–xTi_xO₃ (PZT) and Pb(Mg_1/3Nb_2/3)_1–xTi_xO₃ (PMN-xPT) are complex lead-oxide perovskites that display exceptional piezoelectric properties for pseudorhombohedral compositions near a tetragonal phase boundary. In PZT these compositions are ferroelectrics, but in PMN-xPT they are relaxors because the dielectric permittivity is frequency dependent and exhibits non-Arrhenius behavior. We show that the nanoscale structure unique to PMN-xPT and other lead-oxide perovskite relaxors is absent in PZT and correlates with a greater than 100% enhancement of the longitudinal piezoelectric coefficient in PMN-xPT relative to that in PZT. By comparing dielectric, structural, lattice dynamical, and piezoelectric measurements on PZT and PMN-xPT, two nearly identical compounds that represent weak and strong random electric field limits, we show that quenched (static) random fields establish the relaxor phase and identify the order parameter.

Original language	English
Pages (from-to)	1754-1759
Number of pages	6
Journal	Proceedings of the National Academy of Sciences (PNAS)
Volume	111
Issue number	5
DOIs	https://doi.org/10.1073/pnas.1314780111
Publication status	Published - 4 Feb 2014

Keywords / Materials (for Non-textual outputs)

lead zirconate titanate
piezoelectricity
short-range order
soft modes
neutron scattering
DIFFUSE-SCATTERING
SINGLE-CRYSTAL
ELECTROMECHANICAL RESPONSE
FERROELECTRICS
PBMG1/3TA2/3O3
PEROVSKITES
INSTABILITY

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10.1073/pnas.1314780111

Chris Stock
- cstocked.acuk
- School of Physics and Astronomy - Personal Chair of Neutron Spectroscopy
Person: Academic: Research Active

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title = "Role of random electric fields in relaxors",

abstract = "PbZr1–xTixO3 (PZT) and Pb(Mg1/3Nb2/3)1–xTixO3 (PMN-xPT) are complex lead-oxide perovskites that display exceptional piezoelectric properties for pseudorhombohedral compositions near a tetragonal phase boundary. In PZT these compositions are ferroelectrics, but in PMN-xPT they are relaxors because the dielectric permittivity is frequency dependent and exhibits non-Arrhenius behavior. We show that the nanoscale structure unique to PMN-xPT and other lead-oxide perovskite relaxors is absent in PZT and correlates with a greater than 100% enhancement of the longitudinal piezoelectric coefficient in PMN-xPT relative to that in PZT. By comparing dielectric, structural, lattice dynamical, and piezoelectric measurements on PZT and PMN-xPT, two nearly identical compounds that represent weak and strong random electric field limits, we show that quenched (static) random fields establish the relaxor phase and identify the order parameter.",

keywords = "lead zirconate titanate, piezoelectricity, short-range order, soft modes, neutron scattering, DIFFUSE-SCATTERING, SINGLE-CRYSTAL, ELECTROMECHANICAL RESPONSE, FERROELECTRICS, PBMG1/3TA2/3O3, PEROVSKITES, INSTABILITY",

author = "Daniel Phelan and Christopher Stock and Rodriguez-Rivera, {Jose A.} and Songxue Chi and Juscelino Leao and Xifa Long and Yujuan Xie and Bokov, {Alexei A.} and Zuo-Guang Ye and Panchapakesan Ganesh and Gehring, {Peter M.}",

year = "2014",

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doi = "10.1073/pnas.1314780111",

language = "English",

volume = "111",

pages = "1754--1759",

journal = "Proceedings of the National Academy of Sciences (PNAS)",

issn = "0027-8424",

publisher = "National Academy of Sciences",

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TY - JOUR

T1 - Role of random electric fields in relaxors

AU - Phelan, Daniel

AU - Stock, Christopher

AU - Rodriguez-Rivera, Jose A.

AU - Chi, Songxue

AU - Leao, Juscelino

AU - Long, Xifa

AU - Xie, Yujuan

AU - Bokov, Alexei A.

AU - Ye, Zuo-Guang

AU - Ganesh, Panchapakesan

AU - Gehring, Peter M.

PY - 2014/2/4

Y1 - 2014/2/4

N2 - PbZr1–xTixO3 (PZT) and Pb(Mg1/3Nb2/3)1–xTixO3 (PMN-xPT) are complex lead-oxide perovskites that display exceptional piezoelectric properties for pseudorhombohedral compositions near a tetragonal phase boundary. In PZT these compositions are ferroelectrics, but in PMN-xPT they are relaxors because the dielectric permittivity is frequency dependent and exhibits non-Arrhenius behavior. We show that the nanoscale structure unique to PMN-xPT and other lead-oxide perovskite relaxors is absent in PZT and correlates with a greater than 100% enhancement of the longitudinal piezoelectric coefficient in PMN-xPT relative to that in PZT. By comparing dielectric, structural, lattice dynamical, and piezoelectric measurements on PZT and PMN-xPT, two nearly identical compounds that represent weak and strong random electric field limits, we show that quenched (static) random fields establish the relaxor phase and identify the order parameter.

AB - PbZr1–xTixO3 (PZT) and Pb(Mg1/3Nb2/3)1–xTixO3 (PMN-xPT) are complex lead-oxide perovskites that display exceptional piezoelectric properties for pseudorhombohedral compositions near a tetragonal phase boundary. In PZT these compositions are ferroelectrics, but in PMN-xPT they are relaxors because the dielectric permittivity is frequency dependent and exhibits non-Arrhenius behavior. We show that the nanoscale structure unique to PMN-xPT and other lead-oxide perovskite relaxors is absent in PZT and correlates with a greater than 100% enhancement of the longitudinal piezoelectric coefficient in PMN-xPT relative to that in PZT. By comparing dielectric, structural, lattice dynamical, and piezoelectric measurements on PZT and PMN-xPT, two nearly identical compounds that represent weak and strong random electric field limits, we show that quenched (static) random fields establish the relaxor phase and identify the order parameter.

KW - lead zirconate titanate

KW - piezoelectricity

KW - short-range order

KW - soft modes

KW - neutron scattering

KW - DIFFUSE-SCATTERING

KW - SINGLE-CRYSTAL

KW - ELECTROMECHANICAL RESPONSE

KW - FERROELECTRICS

KW - PBMG1/3TA2/3O3

KW - PEROVSKITES

KW - INSTABILITY

U2 - 10.1073/pnas.1314780111

DO - 10.1073/pnas.1314780111

M3 - Article

SN - 0027-8424

VL - 111

SP - 1754

EP - 1759

JO - Proceedings of the National Academy of Sciences (PNAS)

JF - Proceedings of the National Academy of Sciences (PNAS)

IS - 5

ER -

Role of random electric fields in relaxors

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Keywords / Materials (for Non-textual outputs)

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