A Crystal-Chemical Framework for Relaxor versus Normal Ferroelectric Behavior in Tetragonal Tungsten Bronzes
authors Zhu, X; Fu, M; Stennett, MC; Vilarinho, PM; Levin, I; Randall, CA; Gardner, J; Morrison, FD; Reaney, IM
nationality International
journal CHEMISTRY OF MATERIALS
keywords LEAD BARIUM NIOBATE; PBN SINGLE-CRYSTALS; DIELECTRIC-PROPERTIES; INCOMMENSURATE SUPERSTRUCTURES; PYROELECTRIC PROPERTIES; ELECTRICAL-PROPERTIES; PHASE-TRANSITION; RARE-EARTH; CERAMICS; SYSTEM
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 dieletric 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 dispiacive 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.
publisher AMER CHEMICAL SOC
issn 0897-4756
year published 2015
volume 27
issue 9
beginning page 3250
ending page 3261
digital object identifier (doi) 10.1021/acs.chemmater.5b00072
web of science category Chemistry, Physical; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000354578600013
  ciceco authors
  impact metrics
times cited (wos core): 23
journal impact factor (jcr 2016): 9.466
5 year journal impact factor (jcr 2016): 9.242
category normalized journal impact factor percentile (jcr 2016): 93.398
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