Zhukov, Sergey ; Fedosov, Sergey ; Glaum, Julia ; Granzow, Torsten ; Genenko, Yuri A. ; Seggern, Heinz von (2010)
Effect of bipolar electric fatigue on polarization switching in lead-zirconate-titanate ceramics.
In: Journal of Applied Physics, 108 (1)
doi: 10.1063/1.3452326
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
From comparison of experimental results on polarization switching in fresh and electrically fatigued lead-zirconate-titanate (PZT) over a wide range of applied fields and switching times it is concluded that fatigue alters the local field distribution inside the sample due to the generation of discrete defects, such as voids and cracks. Such defects have a strong influence on the overall electric field distribution by their shape and dielectric permittivity. On this hypothesis, a new phenomenological model of polarization switching in fatigued PZT is proposed. The model assumes that the fatigued sample can be composed of different local regions which exhibit different field strengths but otherwise can be considered as unfatigued. Consequently the temporal response of a fatigued sample is assumed to be the superposition of the field-dependent temporal responses of unfatigued samples weighted by their respective volume fraction. A certain part of the volume is excluded from the overall switching process due to the domain pinning even at earlier stages of fatigue, which can be recovered by annealing. Suitability of the proposed model is demonstrated by a good correlation between experimental and calculated data for differently fatigued samples. Plausible cause of the formation of such regions is the generation of defects such as microcracks and the change in electrical properties at imperfections such as pores or voids.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Zhukov, Sergey ; Fedosov, Sergey ; Glaum, Julia ; Granzow, Torsten ; Genenko, Yuri A. ; Seggern, Heinz von |
| Art des Eintrags: | Bibliographie |
| Titel: | Effect of bipolar electric fatigue on polarization switching in lead-zirconate-titanate ceramics |
| Sprache: | Englisch |
| Publikationsjahr: | Juli 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 108 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1063/1.3452326 |
| Kurzbeschreibung (Abstract): | From comparison of experimental results on polarization switching in fresh and electrically fatigued lead-zirconate-titanate (PZT) over a wide range of applied fields and switching times it is concluded that fatigue alters the local field distribution inside the sample due to the generation of discrete defects, such as voids and cracks. Such defects have a strong influence on the overall electric field distribution by their shape and dielectric permittivity. On this hypothesis, a new phenomenological model of polarization switching in fatigued PZT is proposed. The model assumes that the fatigued sample can be composed of different local regions which exhibit different field strengths but otherwise can be considered as unfatigued. Consequently the temporal response of a fatigued sample is assumed to be the superposition of the field-dependent temporal responses of unfatigued samples weighted by their respective volume fraction. A certain part of the volume is excluded from the overall switching process due to the domain pinning even at earlier stages of fatigue, which can be recovered by annealing. Suitability of the proposed model is demonstrated by a good correlation between experimental and calculated data for differently fatigued samples. Plausible cause of the formation of such regions is the generation of defects such as microcracks and the change in electrical properties at imperfections such as pores or voids. |
| Freie Schlagworte: | annealing, dielectric polarisation, electric domains, electric field effects, ferroelectric ceramics, lead compounds, microcracks, permittivity, voids (solid) |
| Zusätzliche Informationen: | SFB 595 Cooperation B7, C5, D1 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung > Teilprojekt B7:Polarisation und Ladung in elektrisch ermüdeten Ferroelektrika DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > C - Modellierung > Teilprojekt C5: Phänomenologische Modellierung von Injektion, Transport und Rekombination in Bauelementen aus organischen Halbleitern sowie aus nichtorganischen Ferroelektrika DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > D - Bauteileigenschaften > Teilprojekt D1: Mesoskopische und makroskopische Ermüdung in dotierten ferroelektrischen Keramiken DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > C - Modellierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > D - Bauteileigenschaften DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 17 Jun 2011 11:34 |
| Letzte Änderung: | 05 Mär 2013 09:48 |
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