Influence of Mn doping on the semiconducting properties of CaCu3Ti4O12 ceramics

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.

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Official URL: http://dx.doi.org/10.1063/1.2200732
Link to published version:: 10.1063/1.2200732

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.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1063/1.2200732
Depositing User: Hilary Ridgway
Date Deposited: 07 Jun 2012 09:48
Last Modified: 07 Jun 2012 09:48
URI: http://shura.shu.ac.uk/id/eprint/5342

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