Pforr, Florian ; Major, Márton ; Donner, Wolfgang ; Stuhr, Uwe ; Roessli, Bertrand (2016)
Influence of tetragonal platelets on the dielectric permittivity of0.964Na1/2Bi1/2TiO3−0.036BaTiO3.
In: Physical Review B, 94 (1)
doi: 10.1103/PhysRevB.94.014105
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We study the temperature-dependent evolution of the octahedral tilt order in a lead-free relaxor ferroelectric and its impact on the ferroelectric properties. Using diffuse neutron scattering on a 0.964Na1/2Bi1/2TiO3−0.036BaTiO3 single crystal, we suggest a model for the temperature-dependent nanostructure of this perovskite that features chemically pinned tetragonal platelets embedded in the rhombohedral matrix, often separated by a cubic intermediate phase. Our results show a clear correlation between the squared thickness of the tetragonal platelets and the dielectric permittivity. This is interpreted as a sign for increased polarizability of the strained and distorted lattice at the center of the tetragonal platelets.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Pforr, Florian ; Major, Márton ; Donner, Wolfgang ; Stuhr, Uwe ; Roessli, Bertrand |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of tetragonal platelets on the dielectric permittivity of0.964Na1/2Bi1/2TiO3−0.036BaTiO3 |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Juli 2016 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 94 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1103/PhysRevB.94.014105 |
| Kurzbeschreibung (Abstract): | We study the temperature-dependent evolution of the octahedral tilt order in a lead-free relaxor ferroelectric and its impact on the ferroelectric properties. Using diffuse neutron scattering on a 0.964Na1/2Bi1/2TiO3−0.036BaTiO3 single crystal, we suggest a model for the temperature-dependent nanostructure of this perovskite that features chemically pinned tetragonal platelets embedded in the rhombohedral matrix, often separated by a cubic intermediate phase. Our results show a clear correlation between the squared thickness of the tetragonal platelets and the dielectric permittivity. This is interpreted as a sign for increased polarizability of the strained and distorted lattice at the center of the tetragonal platelets. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Dünne Schichten 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 18 Mai 2017 08:16 |
| Letzte Änderung: | 18 Mai 2017 08:16 |
| PPN: | |
| Sponsoren: | This research project has been supported by the European Commission under the 7th Framework Programme through the “Research Infrastructures” action of the “Capacities” Programme, NMI3-II Grant No. 283883., This work was funded by the Deutsche Forschungsgemeinschaft (DFG) under SFB 595 “Electrical Fatigue in Functional Materials.” |
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