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Local symmetry-reduction in tetragonal (La,Fe)-codoped Pb[Zr0.4Ti0.6]O3 piezoelectric ceramics

Erdem, Emre and Eichel, Rüdiger-A. and Kungl, Hans and Hoffmann, Michael J. and Ozarowski, Andrew and van Tol, Hans and Brunel, Louis Claude (2007):
Local symmetry-reduction in tetragonal (La,Fe)-codoped Pb[Zr0.4Ti0.6]O3 piezoelectric ceramics.
In: Physica Scripta, (T129), Institute of Physics Publishing (IOP), pp. 12-16, ISSN 0031-8949,
DOI: 10.1088/0031-8949/2007/T129/003,
[Online-Edition: http://dx.doi.org/10.1088/0031-8949/2007/T129/003],
[Article]

Abstract

Ferroelectric Pb[Zr0.4Ti0.6]O3 ceramics codoped with La3+ and Fe3+ at dopant concentrations of 1.0 and 0.5 mol. %, respectively, were investigated by means of multifrequency electron paramagnetic resonance (EPR) spectroscopy. The results prove that iron is incorporated at the [Zr,Ti]-site, acts as an acceptor and favors the creation of charged (Fe ' Zr, Ti- VO••)• defect dipoles that may give rise to internal bias fields also for 'soft' piezoelectric compounds. In particular, the iron functional center site symmetry was investigated. A multi-site situation was observed in which the orientation of the (Fe ' Zr, Ti- VO••)• defect dipole with respect to the orientation of spontaneous polarization is responsible for a (Fe ' Zr, Ti- VO••)• center of 'tetragonal' and a different center of 'rhombic' local site symmetry.

Item Type: Article
Erschienen: 2007
Creators: Erdem, Emre and Eichel, Rüdiger-A. and Kungl, Hans and Hoffmann, Michael J. and Ozarowski, Andrew and van Tol, Hans and Brunel, Louis Claude
Title: Local symmetry-reduction in tetragonal (La,Fe)-codoped Pb[Zr0.4Ti0.6]O3 piezoelectric ceramics
Language: English
Abstract:

Ferroelectric Pb[Zr0.4Ti0.6]O3 ceramics codoped with La3+ and Fe3+ at dopant concentrations of 1.0 and 0.5 mol. %, respectively, were investigated by means of multifrequency electron paramagnetic resonance (EPR) spectroscopy. The results prove that iron is incorporated at the [Zr,Ti]-site, acts as an acceptor and favors the creation of charged (Fe ' Zr, Ti- VO••)• defect dipoles that may give rise to internal bias fields also for 'soft' piezoelectric compounds. In particular, the iron functional center site symmetry was investigated. A multi-site situation was observed in which the orientation of the (Fe ' Zr, Ti- VO••)• defect dipole with respect to the orientation of spontaneous polarization is responsible for a (Fe ' Zr, Ti- VO••)• center of 'tetragonal' and a different center of 'rhombic' local site symmetry.

Journal or Publication Title: Physica Scripta
Number: T129
Publisher: Institute of Physics Publishing (IOP)
Divisions: DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
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 > 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 > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B1: EPR-Investigations of defects in ferroelectric ceramic material
Date Deposited: 27 Jul 2011 11:33
DOI: 10.1088/0031-8949/2007/T129/003
Official URL: http://dx.doi.org/10.1088/0031-8949/2007/T129/003
Additional Information:

SFB 595 Cooperation A2, B1

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