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Influence of tetragonal platelets on the dielectric permittivity of0.964Na1/2Bi1/2TiO3−0.036BaTiO3

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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