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Article Dans Une Revue Solid State Sciences Année : 2015

Capacitance Scaling of Grain Boundaries with Colossal Permittivity of CaCu3Ti4O12-Based Materials

Résumé

Samples of copper-deficient CaCu3Ti4O12 (CCTO) compared to the nominal composition, all synthesized via organic gel-assisted citrate process, show huge change of grain boundaries capacitance as deduced from a fit of an RC element model to the impedance spectroscopic data. The grain boundary capacitance is found to scale with the permittivity measured at 1 kHz weighted by the size of the grains. This result is found consistent with the internal barrier layer capacitance (IBLC) model.

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Matériaux
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Dates et versions

hal-01757208 , version 1 (03-04-2018)

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Sonia de Almeida-Didry, Cecile Autret, Christophe Honstettre, Anthony Lucas, François Pacreau, et al.. Capacitance Scaling of Grain Boundaries with Colossal Permittivity of CaCu3Ti4O12-Based Materials. Solid State Sciences, 2015, 42, pp.25--29. ⟨10.1016/j.solidstatesciences.2015.03.004⟩. ⟨hal-01757208⟩
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