Domain reorientation anisotropy in ferroelectric polycrystals
Domain reorientation anisotropy in ferroelectric polycrystals
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DOI：
10.1063/1.1495531
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发表时间：
2002-07
影响因子：
3.2
通讯作者：
M. Lente;J. Eiras
中科院分区：
文献类型：
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作者：
M. Lente;J. Eiras
通过对软硬锆钛酸铅(PZT)块体陶瓷磁滞回线的测量，研究了多晶材料中的磁畴重取向过程。为了研究电畴与电场的对准程度，对每个样品进行了两个垂直方向的铁电表征。研究发现，对于软PZT，空间电荷在特定方向的疲劳过程动力学不受另一个垂直方向的先前疲劳故事的影响，表现出疲劳各向异性。这是由于部分空间电荷在电场转换过程中没有发生位移所致。然而，对于硬质PZT，由于复杂缺陷垂直于电场的连续重新排列，可以观察到先前电场故事的影响。
The domain reorientation process in polycrystalline materials was investigated through hysteresis loop measurements in soft and hard lead zirconate titanate (PZT) bulk ceramics. In order to investigate the degree of alignment of domains with the electric field the ferroelectric characterizations were performed in two perpendicular directions for each sample. It was found that for the soft PZT, the kinetics of the fatigue process due to space charges in a specific direction is not affected by the previous fatigue story induced in the other perpendicular one thus showing a fatigue anisotropy. This fact was attributed to no displacement of part of space charges during the electric field switching. However, for the hard PZT, an influence of the previous electric story could be observed due to the continuous realignment of the complex defects perpendicularly to the electric field.