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 behavior 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 behavior 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 (US) |
|---|---|
| Pages (from-to) | 3250-3261 |
| Number of pages | 12 |
| Journal | Chemistry of Materials |
| Volume | 27 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 12 2015 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
- Materials Chemistry
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A Crystal-chemical framework for relaxor versus normal ferroelectric behavior in tetragonal tungsten bronzes. / Zhu, X.; Fu, M.; Stennett, M. C.; Vilarinho, P. M.; Levin, I.; Randall, Clive A.; Gardner, J.; Morrison, F. D.; Reaney, I. M.
In: Chemistry of Materials, Vol. 27, No. 9, 12.05.2015, p. 3250-3261.Research output: Contribution to journal › Article
TY - JOUR
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, Clive A.
AU - Gardner, J.
AU - Morrison, F. D.
AU - Reaney, I. M.
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 behavior 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 behavior 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 behavior 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 behavior 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.
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U2 - 10.1021/acs.chemmater.5b00072
DO - 10.1021/acs.chemmater.5b00072
M3 - Article
VL - 27
SP - 3250
EP - 3261
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 9
ER -