A crystal-chemical framework for relaxor versus normal ferroelectric behavior in tetragonal tungsten bronzes

X. Zhu; M. Fu; M. C. Stennett; P. M. Vilarinho; I. Levin; C. A. Randall; Jonathan Gardner; F. D. Morrison; I. M.  Reaney

doi:10.1021/acs.chemmater.5b00072

A crystal-chemical framework for relaxor versus normal ferroelectric behavior in tetragonal tungsten bronzes

X. Zhu, M. Fu, M. C. Stennett, P. M. Vilarinho, I. Levin, C. A. Randall, Jonathan Gardner, F. D. Morrison, I. M. Reaney

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

Abstract

Tetragonal Tungsten Bronzes (TTBs) - an important class of oxides known to exhibit ferroelectricity - undergo complex distortions, including rotations of oxygen octahedra, which give rise to either incommensurately or commensurately modulated superstructures. Many TTBs display broad, frequency-dependent relaxor dielectric behaviour rather than sharper frequency-independent normal ferroelectric anomalies but the exact reasons that favor a particular type of dielectric response for a given composition remain unclear. In this contribution the influence of incommensurate/commensurate displacive modulations on the onset of relaxor/ferroelectric behaviour in TTBs is assessed in the context of basic crystal-chemical factors, such as positional disorder, ionic radii and polarizabilities, and point defects. We present a predictive crystal-chemical model that rationalizes composition-structure-properties relations for a broad range of TTB systems.

Original language	English
Pages (from-to)	3250-3261
Journal	Chemistry of Materials
Volume	27
Issue number	9
Early online date	9 Apr 2015
DOIs	https://doi.org/10.1021/acs.chemmater.5b00072
Publication status	Published - 12 May 2015

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ChemMater_2015_TTB overview
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © 2015 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.chemmater.5b00072
Accepted author manuscript, 6.08 MB

Finlay Morrison
- fm40st-andrews.acuk
- School of Chemistry - Professor
- EaSTCHEM
Person: Academic

Data underpinning - Relaxor-to-ferroelectric crossover and disruption of polar order in ‘empty’ tetragonal tungsten bronzes
Gardner, J. (Creator), Yu, F. (Creator), Tang, C. (Contributor), Kockelmann, W. (Contributor), Zhou, W. (Creator) & Morrison, F. D. (Creator), University of St Andrews, 8 Jun 2016
DOI: 10.17630/a7a9bc13-b5cb-485d-914a-923832f25190
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title = "A crystal-chemical framework for relaxor versus normal ferroelectric behavior in tetragonal tungsten bronzes",

abstract = "Tetragonal Tungsten Bronzes (TTBs) - an important class of oxides known to exhibit ferroelectricity - undergo complex distortions, including rotations of oxygen octahedra, which give rise to either incommensurately or commensurately modulated superstructures. Many TTBs display broad, frequency-dependent relaxor dielectric behaviour rather than sharper frequency-independent normal ferroelectric anomalies but the exact reasons that favor a particular type of dielectric response for a given composition remain unclear. In this contribution the influence of incommensurate/commensurate displacive modulations on the onset of relaxor/ferroelectric behaviour in TTBs is assessed in the context of basic crystal-chemical factors, such as positional disorder, ionic radii and polarizabilities, and point defects. We present a predictive crystal-chemical model that rationalizes composition-structure-properties relations for a broad range of TTB systems.",

author = "X. Zhu and M. Fu and Stennett, {M. C.} and Vilarinho, {P. M.} and I. Levin and Randall, {C. A.} and Jonathan Gardner and Morrison, {F. D.} and Reaney, {I. M.}",

note = "Ian M. Reaney acknowledges the support of the National Institute of Standards and Technology Visiting Scientist program.",

year = "2015",

month = may,

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doi = "10.1021/acs.chemmater.5b00072",

language = "English",

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T1 - A crystal-chemical framework for relaxor versus normal ferroelectric behavior in tetragonal tungsten bronzes

AU - Zhu, X.

AU - Fu, M.

AU - Stennett, M. C.

AU - Vilarinho, P. M.

AU - Levin, I.

AU - Randall, C. A.

AU - Gardner, Jonathan

AU - Morrison, F. D.

AU - Reaney, I. M.

N1 - Ian M. Reaney acknowledges the support of the National Institute of Standards and Technology Visiting Scientist program.

PY - 2015/5/12

Y1 - 2015/5/12

N2 - Tetragonal Tungsten Bronzes (TTBs) - an important class of oxides known to exhibit ferroelectricity - undergo complex distortions, including rotations of oxygen octahedra, which give rise to either incommensurately or commensurately modulated superstructures. Many TTBs display broad, frequency-dependent relaxor dielectric behaviour rather than sharper frequency-independent normal ferroelectric anomalies but the exact reasons that favor a particular type of dielectric response for a given composition remain unclear. In this contribution the influence of incommensurate/commensurate displacive modulations on the onset of relaxor/ferroelectric behaviour in TTBs is assessed in the context of basic crystal-chemical factors, such as positional disorder, ionic radii and polarizabilities, and point defects. We present a predictive crystal-chemical model that rationalizes composition-structure-properties relations for a broad range of TTB systems.

AB - Tetragonal Tungsten Bronzes (TTBs) - an important class of oxides known to exhibit ferroelectricity - undergo complex distortions, including rotations of oxygen octahedra, which give rise to either incommensurately or commensurately modulated superstructures. Many TTBs display broad, frequency-dependent relaxor dielectric behaviour rather than sharper frequency-independent normal ferroelectric anomalies but the exact reasons that favor a particular type of dielectric response for a given composition remain unclear. In this contribution the influence of incommensurate/commensurate displacive modulations on the onset of relaxor/ferroelectric behaviour in TTBs is assessed in the context of basic crystal-chemical factors, such as positional disorder, ionic radii and polarizabilities, and point defects. We present a predictive crystal-chemical model that rationalizes composition-structure-properties relations for a broad range of TTB systems.

U2 - 10.1021/acs.chemmater.5b00072

DO - 10.1021/acs.chemmater.5b00072

M3 - Article

SN - 0897-4756

VL - 27

SP - 3250

EP - 3261

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 9

ER -

A crystal-chemical framework for relaxor versus normal ferroelectric behavior in tetragonal tungsten bronzes

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Data underpinning - Relaxor-to-ferroelectric crossover and disruption of polar order in ‘empty’ tetragonal tungsten bronzes

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