Publication: Dielectric spectroscopy analysis of CaCu3Ti4O12 polycrystalline systems
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Date
2006-11-06
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics (AIP)
Type
Article
Access right
Acesso aberto
Abstract
Dielectric spectroscopy was used in this study to examine CaCu3Ti4O12 polycrystalline samples. The analysis involved systems presenting low non-Ohmic properties, and the grain's internal domain was evaluated separately from the contribution of barrier-layer capacitances associated with Schottky-type barriers in this type of material. The effect of oxygen-rich atmosphere and high cooling rate was evaluated, revealing a strong increase in the dielectric properties of the CaCu3Ti4O12 system under these conditions. This effect was attributed to a chemical change in the grain's internal domain, which may be considered an internal barrier-layer capacitance of the polycrystalline material. (c) 2006 American Institute of Physics.
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Language
English
Citation
Applied Physics Letters. Melville: Amer Inst Physics, v. 89, n. 19, 3 p., 2006.
