Influence of Mn doping on the semiconducting properties of CaCu3Ti4O12 ceramics

被引：163

作者：

Li, Ming ^{[1
]}

Feteira, Antonio ^{[1
]}

Sinclair, Derek C. ^{[1
]}

West, Anthony R. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 23期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1063/1.2200732

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (c) 2006 American Institute of Physics.

引用

页数：3

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