Berlin 2008 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 7: Point defect spectroscopy and engeneering
DF 7.4: Vortrag
Dienstag, 26. Februar 2008, 11:40–12:00, EB 107
The effect of (Gd3+,Cu2+) and (Gd3+,Fe3+) Co-Doping on the Defect Chemistry of PbTiO3 — •Michael Drahus1, Rüdiger Eichel1, Emre Erdem1, Hans Kungl2, and Michael Hoffman2 — 1Eduard-Zintl-Institut, Technische Universität Darmstadt, Germany — 2Institut für Keramik im Maschinenbau, Universtität Karlsruhe
The effect of Co-doping PbTiO3 with (Gd3+, Cu2+) and (Gd3+, Fe3+) on dopant cation association of oxygen vacancies is examined with multiply-frequency EPR. Also, the possibility of the Gd cation substuting on both the A and B site as a self compensating acceptor donor is explored. Acceptordonor codoping has shown encouraging results as a way to reduce the Polarization Fatigue in both thin film and bulk Ferroelectrics. Therefore an understanding of the defect chemistry initiated by these scenarios is important for determining the underlying mechanism of polarization fatigue suppression