Role of random electric fields in relaxors

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

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

141 Scopus citations

Abstract

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 of the United States of America
Volume	111
Issue number	5
DOIs	https://doi.org/10.1073/pnas.1314780111
State	Published - Feb 4 2014

Keywords

Lead zirconate titanate
Neutron scattering
Piezoelectricity
Short-range order
Soft modes

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10.1073/pnas.1314780111

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

abstract = "PbZr1-xTixO3 (PZT) and Pb(Mg 1/3Nb2/3)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, Neutron scattering, Piezoelectricity, Short-range order, Soft modes",

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

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doi = "10.1073/pnas.1314780111",

language = "English",

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AU - Phelan, Daniel

AU - Stock, Christopher

AU - Rodriguez-Rivera, Jose A.

AU - Chi, Songxue

AU - Leão, 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(Mg 1/3Nb2/3)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(Mg 1/3Nb2/3)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 - Neutron scattering

KW - Piezoelectricity

KW - Short-range order

KW - Soft modes

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DO - 10.1073/pnas.1314780111

M3 - Article

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JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 5

ER -

Role of random electric fields in relaxors

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Keywords

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