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

Datta K, Richter A, Göbbels M, Neder R, Mihailova B (2015)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2015

Journal

Physical Review B - Condensed Matter and Materials Physics American Physical Society (APS)

Publisher: American Physical Society

Book Volume: 92

Article Number: 024107

Journal Issue: 2

DOI: 10.1103/PhysRevB.92.024107

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.

Authors with CRIS profile

Kaustuv Datta Lehrstuhl für Kristallographie und Strukturphysik (ICSP) Andreas Richter Lehrstuhl für Mineralogie Matthias Göbbels Lehrstuhl für Mineralogie Reinhard Neder Professur für Allgemeine Mineralogie/Kristallographie

Involved external institutions

Universität Hamburg (UHH) DE Germany (DE)

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://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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