Direct mapping of microscopic polarization in ferroelectric x(BiScO3)-(1-x)(PbTiO3) throughout its morphotropic phase boundary
Datta K, Richter A, Göbbels M, Keen DA, Neder R (2016)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2016
Journal
Publisher: American Physical Society
Book Volume: 93
Article Number: 064102
Journal Issue: 6
DOI: 10.1103/PhysRevB.93.064102
Abstract
Pair distribution functions of ferroelectric xBiScO3-(1-x)PbTiO3, obtained from neutron total scattering data, were examined and modeled utilizing the reverse Monte Carlo technique to depict exclusively the local structure of this compound throughout its reported morphotropic phase boundary (MPB). Microscopic polarizations due to the cation shifts have been mapped out from the refined crystal structure as a function of composition in order to reveal individual cation behavior driven by the composition. Direct evidences are provided for large static displacements of the cations (∼0.2-0.5Å), local cation ordering between Ti and Sc, and a categorical change of favored polarization directions of the cations at the conjuncture of the MPB. Apart from Sc, all cations have demonstrated an apparent transition from a relatively defined directional distribution to a broad and random distribution at x=xMPB, suggesting a flattening of the local potential function for them. These features can further be correlated with the general concept of structural instability of a ferroelectric system at the MPB, which is often linked to the manifestation of enhanced physical properties.
Authors with CRIS profile
Kaustuv Datta
Lehrstuhl für Kristallographie und Strukturphysik
Andreas Richter
Lehrstuhl für Mineralogie
Matthias Göbbels
Lehrstuhl für Mineralogie
Reinhard Neder
Professur für Allgemeine Mineralogie/Kristallographie
Involved external institutions
United Kingdom (GB)How to cite
APA:
Datta, K., Richter, A., Göbbels, M., Keen, D.A., & Neder, R. (2016). Direct mapping of microscopic polarization in ferroelectric x(BiScO3)-(1-x)(PbTiO3) throughout its morphotropic phase boundary. Physical Review B - Condensed Matter and Materials Physics, 93(6). https://doi.org/10.1103/PhysRevB.93.064102
MLA:
Datta, Kaustuv, et al. "Direct mapping of microscopic polarization in ferroelectric x(BiScO3)-(1-x)(PbTiO3) throughout its morphotropic phase boundary." Physical Review B - Condensed Matter and Materials Physics 93.6 (2016).
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