Unexpected dielectric response in lead zirconate titanate ceramics: The role of ferroelectric domain wall pinning effects
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Temperature dependent dielectric response has been measured in Pb(Zr1-xTix)O-3 ceramics. Samples of different compositions (x=0.40, 0.47, and 0.60), pure and doped with Nb-or Fe, were studied at temperatures between 15 and 700 K and in the frequency range from 100 Hz to 1 MHz. Unexpected dielectric behavior has been found around room temperature. Anomalous temperature dependent permittivity is observed in pure and Fe-doped samples but not in Nb-doped samples. The anomaly appears related to the presence of oxygen vacancies but not on the sample crystallographic phase. The authors suggest that the anomaly may be a manifestation of the domain wall pinning effect. (C) 2007 American Institute of Physics.
CitationGarcía, J. E., Gomis, V., Pérez, R., Albareda, A., Eiras, J. A. Unexpected dielectric response in lead zirconate titanate ceramics: The role of ferroelectric domain wall pinning effects. "Applied physics letters", Juliol 2007, vol. 91, núm. 4, p. 1-3.