Ferro- and Antiferroelectricity: Order/Disorder Versus Displacive

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Naresh Dalal, Annette Bussmann-Holder
Springer Science & Business Media, Mar 16, 2007 - Science - 220 pages
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Solid-state systems are frequently classi?ed according to their physical, str- tural or chemical properties. Such schemes are extremely helpful since pr- erties related to any such classi?cation are typically known and facilitate id- tifying solids with special material classes. The best-known examples of these schemes are conductivity or resistivity measurements by means of which m- als are easily distinguishable from insulators. However, frequently clear-cut decisions between material classes are not possible, since anisotropy, chemical composition, binding forces and local effects wash out distinct properties and lead to competition or coexistence. Such unresolved situations are especially typical for transition metal oxides that exhibit a variety of ground-state properties in a fascinating way. Here chemical substitution, doping, pressure or temperature effects easily in?uence the physical properties and may, for instance, induce metal/insulator, antif- romagnet/ferromagnet, insulator/superconductor transitions. This situation is analogous to perovskite ferroelectrics and hydrogen-bonded ferroelectrics, where ferroelectric/antiferroelectric transitions occur with chemical substi- tions of one of the constituent sublattices. In addition, glass-like states (dipolar glasses) are observed and relaxor ferroelectricity with a large potential for - plication frequently occurs.
 

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Contents

OrderDisorder Versus or with Displacive Dynamics in Ferroelectric Systems
1
Superconductivity in Complex Systems
3
Essential Heterogeneities in HoleDoped Cuprate Superconductors
12
Experimental Evidence for the Coexistence of OrderDisorder and Displacive
23
Order and Disorder in Perovskites and Relaxor Ferroelectrics
51
Local Structure and Dynamics of Ferroelectric Solids
68
Ferroelectricity of SrTiO3 Induced by Oxygen Isotope Exchange
91
EvidenceforFerroelectricNucleationCentresinthePseudospinGlassSystem
119
A Comparison of Magnetic Random Access Memories MRAMs
199
TwoComponent Scenarios for NonConventional Exotic Superconductors
211
Subject Index
219
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