Title:
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Unexpected dielectric response in lead zirconate titanate ceramics: The role of ferroelectric domain wall pinning effects
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Author:
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García García, José Eduardo; Gomis Arbonès, Vicente; Pérez Pérez, Rafael; Albareda Tiana, Alfonso; Eiras, Jose A.
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. CEMAD - Caracterització Elèctrica de Materials i Dispositius |
Abstract:
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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. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials::Materials ceràmics -Ferroelectricity -Electronic ceramics -Ceramics -Sintering -Ferroelectric materials -Transition metals -Materials synthesis and processing -Transition metal oxides -Dielectric properties -Crystal structure -Phase transitions -Crystallographic defects -Ferroelectricitat -Ceràmiques electròniques |
Rights:
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Document type:
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Article - Published version Article |
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