Erdem, Emre ; Drahus, Michael D. ; Eichel, Rüdiger-A. ; Kungl, Hans ; Hoffmann, Michael J. ; Ozarowski, Andrew ; Van Tol, Johan ; Brunel, Louis Claude (2008):
DEFECT STRUCTURE IN "SOFT" (Gd,Fe)-CODOPED PZT 52.5/47.5 PIEZOELECTRIC CERAMIC.
In: Functional Materials Letters, 1 (1), p. 7. ISSN 1793-6047,
[Article]
Abstract
Ferroelectric 1 mol% Gd3+ and 0.5 mol% Fe3+ codoped "soft" Pb[Zr0.525Ti0.475]O3 ceramics were studied by means of multifrequency electron paramagnetic resonance (EPR) spectroscopy. The obtained results prove that iron is incorporated at the [Zr,Ti]-site, acting as an acceptor and building a charged (Fe'Zr,Ti - Vo°°)° defect dipole with a directly coordinated oxygen vacancy for partial charge compensation. As the La3+ ion is diamagnetic, no information is accessible about the donor. Gd3+ is an isoelectronic and paramagnetic probe for studying A-site. On the other hand, the donor forms no defect associates with lattice vacancies and rather exists as an "isolated" functional center. Consequently, also the lead vacancies that are created for charge compensation have to exist as isolated centers in compound.
| Item Type: | Article |
|---|---|
| Erschienen: | 2008 |
| Creators: | Erdem, Emre ; Drahus, Michael D. ; Eichel, Rüdiger-A. ; Kungl, Hans ; Hoffmann, Michael J. ; Ozarowski, Andrew ; Van Tol, Johan ; Brunel, Louis Claude |
| Title: | DEFECT STRUCTURE IN "SOFT" (Gd,Fe)-CODOPED PZT 52.5/47.5 PIEZOELECTRIC CERAMIC |
| Language: | English |
| Abstract: | Ferroelectric 1 mol% Gd3+ and 0.5 mol% Fe3+ codoped "soft" Pb[Zr0.525Ti0.475]O3 ceramics were studied by means of multifrequency electron paramagnetic resonance (EPR) spectroscopy. The obtained results prove that iron is incorporated at the [Zr,Ti]-site, acting as an acceptor and building a charged (Fe'Zr,Ti - Vo°°)° defect dipole with a directly coordinated oxygen vacancy for partial charge compensation. As the La3+ ion is diamagnetic, no information is accessible about the donor. Gd3+ is an isoelectronic and paramagnetic probe for studying A-site. On the other hand, the donor forms no defect associates with lattice vacancies and rather exists as an "isolated" functional center. Consequently, also the lead vacancies that are created for charge compensation have to exist as isolated centers in compound. |
| Journal or Publication Title: | Functional Materials Letters |
| Volume of the journal: | 1 |
| Issue Number: | 1 |
| Uncontrolled Keywords: | Lead zirconate titanate; PZT; soft piezoelectrics; gadolinium iron codoping; oxygen vacancy; defect dipole; charge compensation; multi-frequency EPR |
| 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 10:54 |
| URL / URN: | http://dx.doi.org/10.1142/S1793604708000034 |
| Additional Information: | SFB 595 Cooperation A2, B1 |
| Identification Number: | doi:10.1142/S1793604708000034 |
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