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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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

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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",

volume = "27",

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journal = "Chemistry of Materials",

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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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