Khachaturyan, R. ; Zhukov, Sergey ; Schultheiß, Jan ; Galassi, C. ; Reimuth, C. ; Koruza, Jurij ; Seggern, Heinz von ; Genenko, Yuri A. (2017)
Polarization-switching dynamics in bulk ferroelectrics with isometric and oriented anisometric pores.
In: Journal of Physics D: Applied Physics, 50
doi: 10.1088/1361-6463/aa519c
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Highly porous ferroelectric ceramics possess remarkably less polarizability than dense ceramics; instead they display high tunability of various physical properties. Particularly, the shape and orientation of pores as well as the total porosity exhibit a great effect on the polarization-switching dynamics. In the present work, finite-element simulations of the electric-field distributions and related statistical distributions of local switching times are analysed and compared with the switching characteristics of porous lead zirconate titanate ceramics, extracted from the experiment by means of the inhomogeneous field mechanism model of polarization switching. Surprisingly, the simulated statistical field-distributions turn out to be virtually independent of the pore-size distribution; however, they are sensitive to the anisometric shape and orientation of the pores. Additionally, they exhibit notable broadening with increasing porosity; an effect confirmed by experimental observations.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Khachaturyan, R. ; Zhukov, Sergey ; Schultheiß, Jan ; Galassi, C. ; Reimuth, C. ; Koruza, Jurij ; Seggern, Heinz von ; Genenko, Yuri A. |
| Art des Eintrags: | Bibliographie |
| Titel: | Polarization-switching dynamics in bulk ferroelectrics with isometric and oriented anisometric pores |
| Sprache: | Englisch |
| Publikationsjahr: | April 2017 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics D: Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 50 |
| DOI: | 10.1088/1361-6463/aa519c |
| Kurzbeschreibung (Abstract): | Highly porous ferroelectric ceramics possess remarkably less polarizability than dense ceramics; instead they display high tunability of various physical properties. Particularly, the shape and orientation of pores as well as the total porosity exhibit a great effect on the polarization-switching dynamics. In the present work, finite-element simulations of the electric-field distributions and related statistical distributions of local switching times are analysed and compared with the switching characteristics of porous lead zirconate titanate ceramics, extracted from the experiment by means of the inhomogeneous field mechanism model of polarization switching. Surprisingly, the simulated statistical field-distributions turn out to be virtually independent of the pore-size distribution; however, they are sensitive to the anisometric shape and orientation of the pores. Additionally, they exhibit notable broadening with increasing porosity; an effect confirmed by experimental observations. |
| Freie Schlagworte: | porous ferroelectrics, polarization-switching dynamics, oriented anisometric pores, statistical field-distributions |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektronische Materialeigenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 03 Jan 2017 07:21 |
| Letzte Änderung: | 27 Mär 2017 10:49 |
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