Mesoscopic-scale structure and dynamics near the morphotropic phase boundary of (1-x)PbTiO3-xBiScO3
Beitrag in einer Fachzeitschrift
(Originalarbeit)
Details zur Publikation
Autor(en): Datta K, Richter A, Göbbels M, Neder R, Mihailova B
Zeitschrift: → Physical Review B - Condensed Matter and Materials Physics |
Verlag: American Physical Society
Jahr der Veröffentlichung: 2015
Band: 92
Heftnummer: 2
ISSN: 1550-235X
Sprache: Englisch
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.
FAU-Autoren / FAU-Herausgeber
| | | Lehrstuhl für Kristallographie und Strukturphysik |
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| Göbbels, Matthias Prof. Dr. |
| | Lehrstuhl für Mineralogie |
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| Neder, Reinhard Prof. Dr. |
| | Professur für Allgemeine Mineralogie/Kristallographie |
|
| | | Lehrstuhl für Mineralogie |
|
Autor(en) der externen Einrichtung(en)
Zitierweisen
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). |