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High-field/high-frequency EPR of paramagnetic functional centers in Cu2+- and Fe3+-modified polycrystalline Pb[ZrxTi1−x]O3 ferroelectrics

Eichel, Rüdiger-A. and Meštrić, Hrvoje and Dinse, Klaus-Peter and Ozarowski, Andrew and van Tol, Johan and Brunel, Louis Claude and Kungl, Hans and Hoffmann, Michael J. (2005):
High-field/high-frequency EPR of paramagnetic functional centers in Cu2+- and Fe3+-modified polycrystalline Pb[ZrxTi1−x]O3 ferroelectrics.
43, In: Magnetic Resonance in Chemistry, (S1), pp. 166-173, ISSN 0749-1581, [Online-Edition: http://dx.doi.org/10.1002/mrc.1696],
[Article]

Abstract

Copper(II)- and iron(III)-modified Pb[ZrxTi1−x]O3 ferroelectrics were investigated by means of high-field/high-frequency EPR. The results obtained suggest that Cu2+ and Fe3+ both substitute as acceptor centers for [Zr,Ti]4+. Whereas for the iron-doped system the charge compensating oxygen vacancies (Vequation image) lead to the formation of charged (Fe′math imageVequation image)· defect associates, no such associates have been observed for the copper-modified system. As regards the morphotropic phase boundary, the model of a mesoscopic mixing of the pure-member phases has been refined to a picture in which a nanoscale composition distribution prevails.

Item Type: Article
Erschienen: 2005
Creators: Eichel, Rüdiger-A. and Meštrić, Hrvoje and Dinse, Klaus-Peter and Ozarowski, Andrew and van Tol, Johan and Brunel, Louis Claude and Kungl, Hans and Hoffmann, Michael J.
Title: High-field/high-frequency EPR of paramagnetic functional centers in Cu2+- and Fe3+-modified polycrystalline Pb[ZrxTi1−x]O3 ferroelectrics
Language: English
Abstract:

Copper(II)- and iron(III)-modified Pb[ZrxTi1−x]O3 ferroelectrics were investigated by means of high-field/high-frequency EPR. The results obtained suggest that Cu2+ and Fe3+ both substitute as acceptor centers for [Zr,Ti]4+. Whereas for the iron-doped system the charge compensating oxygen vacancies (Vequation image) lead to the formation of charged (Fe′math imageVequation image)· defect associates, no such associates have been observed for the copper-modified system. As regards the morphotropic phase boundary, the model of a mesoscopic mixing of the pure-member phases has been refined to a picture in which a nanoscale composition distribution prevails.

Journal or Publication Title: Magnetic Resonance in Chemistry
Volume: 43
Number: S1
Uncontrolled Keywords: lead zirconate titanate; PZT; copper-; iron doping; oxygen vacancies; charge compensation; morphotropic phase boundary; high-field/high-frequency EPR; g-anisotropy
Divisions: 07 Department of Chemistry > Physical Chemistry
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
07 Department of Chemistry
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 27 Jul 2011 12:53
Official URL: http://dx.doi.org/10.1002/mrc.1696
Additional Information:

SFB 595 Cooperation A2, B1

Identification Number: doi:10.1002/mrc.1696
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