Direct mapping of microscopic polarization in ferroelectric x(BiScO3)-(1-x)(PbTiO3) throughout its morphotropic phase boundary

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Datta K, Richter A, Göbbels M, Keen DA, Neder R
Zeitschrift: Physical Review B - Condensed Matter and Materials Physics
Verlag: American Physical Society
Jahr der Veröffentlichung: 2016
Band: 93
Heftnummer: 6
ISSN: 1550-235X
Sprache: Englisch


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.



FAU-Autoren / FAU-Herausgeber

Datta, Kaustuv
Lehrstuhl für Kristallographie und Strukturphysik
Göbbels, Matthias Prof. Dr.
Lehrstuhl für Mineralogie
Neder, Reinhard Prof. Dr.
Professur für Allgemeine Mineralogie/Kristallographie
Richter, Andreas
Lehrstuhl für Mineralogie


Autor(en) der externen Einrichtung(en)
Science & Technology Facilities Council (ISIS)


Zitierweisen

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://dx.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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