期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 95, 期 2, 页码 476-479出版社
WILEY
DOI: 10.1111/j.1551-2916.2011.05025.x
关键词
-
Ceramic samples of CaCu3Ti4O12 (CCTO) were prepared and the voltage-current characteristics were investigated. Extremely strong nonlinear behavior, similar to the reported results in literature [Nature Materials 3[11] 774-8 (2004); Appl. Phys. Lett., 89[19] 191907 (2006); Appl. Phys. Lett., 89[21] 212102 (2006); Appl. Phys. Lett., 91[9] 091912 (2007)] was observed. However, we found that this is a measurement artifact due to a thermionic emission current feedback amplification effect. Compared to that of ZnO varistor, the thermionic emission current of CCTO sample is about six orders of magnitude higher and it is feedback amplified due to strong negative temperature coefficient resistance behavior when the CCTO sample is tested with a voltage (or current) source. Eliminating the thermionic emission current feedback amplification effect, the true value of nonlinear coefficient of the CCTO sample is much lower.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据