Enhanced dielectric responses in Mg-doped CaCu3Ti4O12

被引：76

作者：

Li, M. ^{[1
]}

Cai, Gemei ^{[1
]}

Zhang, D. F. ^{[1
]}

Wang, W. Y. ^{[1
]}

Wang, W. J. ^{[1
]}

Chen, X. L. ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 07期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2989124

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the effects of the Mg doping on the dielectric properties of CaCu3Ti4O12 in the frequency range of 200 Hz-200 kHz and in the temperature range of 58-473 K. It is found that the incorporations of Mg2+ result in increases in the dielectric constant by 12%-20% and decreases in the dielectric loss by 41%-64% (with the minimum of 0.042 for CaCu2.7Mg0.3Ti4O12) at room temperature and at 1 kHz. The x-ray photoemission spectroscopy measurements reveal that the content of Cu3+ increases with the increasing concentration of Mg2+. The enhanced dielectric response may be related to the influence of Cu3+ and/or Mg2+. In other words, Mg2+ is an effective ion to optimize the dielectric properties of CaCu3Ti4O12. (c) 2008 American Institute of Physics.

引用

页数：4

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