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Nonlinearity of strain and strain hysteresis in morphotropic LaSr-doped lead zirconate titanate under unipolar cycling with high electric fields

Kungl, Hans and Fett, Theo and Wagner, Susanne and Hoffmann, Michael J. (2007):
Nonlinearity of strain and strain hysteresis in morphotropic LaSr-doped lead zirconate titanate under unipolar cycling with high electric fields.
In: Journal of Applied Physics, pp. 044101-1-044101-9, 101, (4), ISSN 00218979, [Online-Edition: http://dx.doi.org/10.1063/1.2434836],
[Article]

Abstract

The strain behavior of morphotropic, 1La2Sr-doped lead zirconate titanate was investigated. Particular attention was paid to the electric field induced strain (S-E characteristic) in the high field range for morphotropic materials having different Zr/Ti ratios. Unipolar electrical cycles with maximum fields between 1 and 3 kV/mm were applied to the poled materials under load-free conditions. Strain curves were recorded and the data were evaluated with respect to field dependence of strain and strain hysteresis. Nonlinearity of strain was detected for all materials. Depending on the composition, marked differences were found with respect to the types of nonlinearity. The corresponding data on strain hysteresis indicate that the nonlinearity was due to a loss generating strain mechanism. Therefore the nonlinearity was attributed to domain switching. A phenomenological model is suggested, which is based on the assumptions of a distribution of domain switching over a field range. This field range is characterized by the activation field parameter Ea, which is specific for each composition. The model is capable of explaining the types of nonlinearity in strain that have been observed.

Item Type: Article
Erschienen: 2007
Creators: Kungl, Hans and Fett, Theo and Wagner, Susanne and Hoffmann, Michael J.
Title: Nonlinearity of strain and strain hysteresis in morphotropic LaSr-doped lead zirconate titanate under unipolar cycling with high electric fields
Language: English
Abstract:

The strain behavior of morphotropic, 1La2Sr-doped lead zirconate titanate was investigated. Particular attention was paid to the electric field induced strain (S-E characteristic) in the high field range for morphotropic materials having different Zr/Ti ratios. Unipolar electrical cycles with maximum fields between 1 and 3 kV/mm were applied to the poled materials under load-free conditions. Strain curves were recorded and the data were evaluated with respect to field dependence of strain and strain hysteresis. Nonlinearity of strain was detected for all materials. Depending on the composition, marked differences were found with respect to the types of nonlinearity. The corresponding data on strain hysteresis indicate that the nonlinearity was due to a loss generating strain mechanism. Therefore the nonlinearity was attributed to domain switching. A phenomenological model is suggested, which is based on the assumptions of a distribution of domain switching over a field range. This field range is characterized by the activation field parameter Ea, which is specific for each composition. The model is capable of explaining the types of nonlinearity in strain that have been observed.

Journal or Publication Title: Journal of Applied Physics
Volume: 101
Number: 4
Uncontrolled Keywords: lead compounds, lanthanum compounds, strontium compounds, piezoelectric materials, ferroelectric switching, electric domains, dielectric losses, dielectric hysteresis, high field effects
Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A2: Manufacturing and characterization of PZT-ceramics with defined defect chemistry
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 27 Jul 2011 12:34
Official URL: http://dx.doi.org/10.1063/1.2434836
Additional Information:

SFB 595 A2

Identification Number: doi:10.1063/1.2434836
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