Influence of Mn doping on the semiconducting properties of CaCu3Ti4O12 ceramics

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LI, Ming, FETEIRA, Antonio, SINCLAIR, Derek C. and WEST, Anthony R. (2006). Influence of Mn doping on the semiconducting properties of CaCu3Ti4O12 ceramics. Applied Physics Letters, 88 (23), p. 232903. [Article]

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Abstract

Comparison of impedance spectroscopy data for undoped CaCu3Ti4O12 (CCTO) and CaCu2.94Mn0.06Ti4O12 CCMTO ceramics shows Mn doping to suppress the room temperature bulk semiconductivity. of similar to 0.01 S cm(-1) for CCTO by six orders of magnitude. The magnitude of and activation energy for bulk conduction in CCMTO are similar to those of the insulating grain boundaries in CCTO ceramics. A model to explain the suppression of the bulk conductivity in CCMTO ceramics is proposed; the grain and grain boundary regions in CCTO ceramics may consist of the same phase but with slightly different compositions.

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Official URL:

http://dx.doi.org/10.1063/1.2200732

Research Institute, Centre or Group - Does NOT include content added after October 2018:

Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology

Page Range:

p. 232903

Identifiers

Identification Number:

10.1063/1.2200732

ORCID for Antonio Feteira: