caa a22 4500 445362782 CHVBK 20180317142920.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10832-011-9651-x doi (NATIONALLICENCE)springer-10.1007/s10832-011-9651-x Resistance variation in donor-doped PZT stacks with Cu inner electrodes under high field stress [Elektronische Daten] [Elmar Völkl, Philipp Hillebrand, Juergen Fleig] Changes of the resistance of donor-doped lead zirconate titanate (PZT) under high voltages were investigated at temperatures from 350 to 500°C in different gas atmospheres. Measurements on individual ceramic layers (about 75μm thickness) of PZT multilayer stacks with Cu inner electrodes allowed numerous experiments on nominally identical PZT material. Under high fields, the conductivity decreased significantly on time scales much longer than needed for capacitor charging. At 350°C, for example, decay times of several 1000s were found. The time constant of this conductivity decay depends exponentially on temperature with activation energies of about 1.3eV in air. After interrupting the field stress, thermally activated (ca. 1.1eV) relaxation of the conductivity was found on an even longer time scale. The results are interpreted in terms of oxygen vacancy motion under high fields (stoichiometry polarization) and diffusive relaxation. The importance of oxygen migration despite donor doping is attributed to the high PbO volatility of PZT which readily leads to significant oxygen deficiency. Oxygen diffusion coefficients are estimated. Springer Science+Business Media, LLC, 2011 PZT nationallicence Actuators nationallicence Electrical conductivity nationallicence Defects nationallicence Diffusion nationallicence Völkl Elmar Christian Doppler Laboratory for Advanced Ferroic Oxides, Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9-164/EC, 1060, Vienna, Austria aut Hillebrand Philipp Christian Doppler Laboratory for Advanced Ferroic Oxides, Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9-164/EC, 1060, Vienna, Austria aut Fleig Juergen Christian Doppler Laboratory for Advanced Ferroic Oxides, Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9-164/EC, 1060, Vienna, Austria aut Journal of Electroceramics Springer US; http://www.springer-ny.com 27/2(2011-10-01), 66-77 1385-3449 27:2<66 2011 27 10832 https://doi.org/10.1007/s10832-011-9651-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10832-011-9651-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Völkl Elmar Christian Doppler Laboratory for Advanced Ferroic Oxides, Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9-164/EC, 1060, Vienna, Austria aut NATIONALLICENCE 700 1- Hillebrand Philipp Christian Doppler Laboratory for Advanced Ferroic Oxides, Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9-164/EC, 1060, Vienna, Austria aut NATIONALLICENCE 700 1- Fleig Juergen Christian Doppler Laboratory for Advanced Ferroic Oxides, Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9-164/EC, 1060, Vienna, Austria aut NATIONALLICENCE 773 0- Journal of Electroceramics Springer US; http://www.springer-ny.com 27/2(2011-10-01), 66-77 1385-3449 27:2<66 2011 27 10832 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer