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      Ferroelectric Instability and Dimensionality in Bi-Layered Perovskites and Thin Films

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      Advances in Condensed Matter Physics
      Hindawi Limited

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          Abstract

          The dielectric and thermal properties of Bi (bismuth)-layered perovskite SrBi 2Ta 2O 9(SBT) are discussed in comparison with ferroelectric thin BaTiO 3films. Although these two perovskites exhibit quite a different nature, the dielectric properties of BaTiO 3thin film are similar to those in bulk SBT. The dielectric properties and pseudo-two-dimensional structure between SBT and thin film suggest that the bulk layered ferroelectric SBT is a good model of ultra-thin ferroelectric film with two perovskite layers, free from any misfit lattice strain with substrate and surface charge at the interface with electrodes. Based on the mechanism of ferroelectric phase transition of SBT, it seems plausible that the ferroelectric interaction is still prominent but shows a crossover from ferroelectric to antiferroelectric interaction in perovskite ultra-thin films along the tetragonal axis.

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          Most cited references35

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          Effects of Double Exchange in Magnetic Crystals

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            Crystal stability and the theory of ferroelectricity

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              Fatigue-free ferroelectric capacitors with platinum electrodes

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                Author and article information

                Journal
                Advances in Condensed Matter Physics
                Advances in Condensed Matter Physics
                Hindawi Limited
                1687-8108
                1687-8124
                2012
                2012
                : 2012
                :
                : 1-10
                Article
                10.1155/2012/714625
                ed617bb5-87d1-4a5f-b6c0-35a3d0fca60d
                © 2012

                http://creativecommons.org/licenses/by/3.0/

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