Journal article
Comment on the origin(s) of the giant permittivity effect in CaCu 3 Ti 4 O 12 single crystals and ceramics
Abstract
Impedance spectroscopy has been performed on CaCu3Ti4O12 (CCTO) single crystals and ceramics using Au and InGa alloy electrodes. The extrinsic effect responsible for the giant permittivity observed at radio-frequencies near room temperature is shown to be different for single crystals and ceramics. For single crystals it is attributed to a non-ohmic electrode contact to semiconducting CCTO. For ceramics it is attributed to an internal barrier …
Authors
Ferrarelli MC; Sinclair DC; West AR; Dabkowska HA; Dabkowski A; Luke GM
Journal
Journal of Materials Chemistry, Vol. 19, No. 33, pp. 5916–5919
Publisher
Royal Society of Chemistry (RSC)
Publication Date
2009
DOI
10.1039/b910871h
ISSN
0959-9428