Journal article
(Original article)


Mesoscopic-scale structure and dynamics near the morphotropic phase boundary of (1-x)PbTiO3-xBiScO3


Publication Details
Author(s): Datta K, Richter A, Göbbels M, Neder R, Mihailova B
Publisher: American Physical Society
Publication year: 2015
Volume: 92
Journal issue: 2
ISSN: 1550-235X
Language: English

Abstract

A range of compelling information on the local structure and dynamics of the ferroelectric perovskite-type (ABO3) system (1-x)PbTiO3-xBiScO3 has been revealed through analyzing room-temperature x-ray pair distribution functions and temperature-dependent Raman scattering data for compositions ranging across the morphotropic phase boundary (MPB). Raman scattering data have provided exclusive evidence for distinct dynamical responses from the A-site Pb/Bi and the B-site Ti/Sc cations as a function of composition and temperature. Both pair distribution function and Raman scattering analyses indicate improved coherence between the A-site and B-site off-center displacements for x above the MPB composition. The distinguishable dynamical features were spotted between two sets of compositional range from which x=0.34 could be assigned as a critical composition of "local" MPB: the composition at which the pathway of mesoscopic-scale temperature-driven coupling and transformation processes changes. This differs from the previous reports based on the analysis of the average structure, suggesting the response function of a system may not necessarily follow the evolution of the average structure from which however the MPB has so far been ascribed for a particular system. The individual features of the cations revealed here will further help in understanding the structure-property correlations for similar ferroelectric solid solutions.



How to cite
APA: Datta, K., Richter, A., Göbbels, M., Neder, R., & Mihailova, B. (2015). Mesoscopic-scale structure and dynamics near the morphotropic phase boundary of (1-x)PbTiO3-xBiScO3. Physical Review B - Condensed Matter and Materials Physics, 92(2). https://dx.doi.org/10.1103/PhysRevB.92.024107

MLA: Datta, Kaustuv, et al. "Mesoscopic-scale structure and dynamics near the morphotropic phase boundary of (1-x)PbTiO3-xBiScO3." Physical Review B - Condensed Matter and Materials Physics 92.2 (2015).

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