Effect of external fields on the switching current in PZT ferroelectric ceramics
Effect of external fields on the switching current in PZT ferroelectric ceramics
复制标题
外场对 PZT 铁电陶瓷开关电流的影响
DOI：
10.1016/j.ssc.2009.09.042
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发表时间：
2010-01-01
影响因子：
2.1
通讯作者：
Liu, Yu Sheng
中科院分区：
文献类型：
--
作者：
Nie, Heng Chang;Chen, Xue Feng;Liu, Yu Sheng
研究了锆钛酸铅（PZT）铁电陶瓷中开关电流与温度和外加电场的关系。结果表明，温度对开关电流值的影响不大，但外加电场对开关电流值的影响较大。重要的是，通过这种方法观察到开关电流在频率上的松弛。通过对不同成分PZT陶瓷的对比研究，发现非180度畴开关是导致弛豫的主要原因。从能量的角度出发，提出了一个函数“活动域势”来解释观测结果。所得结果为铁电陶瓷的畴过程提供了一个新的认识，即畴的弛豫是非180度畴的集体运动。2009爱思唯尔有限公司版权所有。
The dependence of a switching current in lead zirconate titanate (PZT) ferroelectric ceramics on the temperature and an applied electrical field was investigated. It was found that temperature has a moderate contribution to the switching current values, but applied electric fields have significant effects on the values. Importantly, a relaxation of switching current on frequency was observed through this method. By a comparison investigation on PZT ceramics of different compositions non-180 degrees domain switching was found to be responsible for the relaxation. A function, the 'active potential of domains' was proposed to interpret the observed results from the viewpoint of energy. The results obtained provide a new understanding of domain process in ferroelectric ceramics that relaxation of domains is a collective motion of non-180 degrees domains. (C) 2009 Elsevier Ltd. All rights reserved.