Domain evolution processes during poling of a near-morphotropic Pb(Zr, Ti)O3 ceramic
Domain evolution processes during poling of a near-morphotropic Pb(Zr, Ti)O3 ceramic
复制标题
DOI：
10.1063/1.4804955
复制
发表时间：
2013-05
影响因子：
3.2
通讯作者：
K. L. Kim;N. Tsou;J. Huber
中科院分区：
文献类型：
--
作者：
K. L. Kim;N. Tsou;J. Huber
用压电响应力显微镜(PFM)观察了近同质PZT极化过程中的磁区壁运动。对块体多晶PZT进行了一系列步骤的极化，并用垂直PFM扫描进行中断，以识别磁畴演化过程。揭示了人字形和棋盘状结构等复杂结构域模式的进化机制。有趣的是，在由彼此成角度的两组薄片组成的人字形图案的情况下，一组薄片扩展并被观察到覆盖另一组，将人字形结构转换成单个薄片。此外，在棋盘状结构中观察到了没有加宽的加长，并且同时加长和加宽了片层结构的磁区带。结果表明，180°和非180°的磁畴转换可以在复杂的磁畴图案中同时发生。提出了一种识别准准同型PZT中各磁区极化方向的方法。该方法将相容结构域的知识与来自电子背散射衍射和PFM数据的结晶学数据相结合。由此得到的极化方向图使得能够清楚地识别极化切换机制。
Domain wall motion during the poling of near-morphotropic Pb(Zr,Ti)O3 PZT was observed using Piezoresponse Force Microscopy (PFM). Poling was conducted on bulk polycrystalline PZT in a series of steps, interrupted by vertical PFM scans, which were used to identify the domain evolution processes. The mechanisms of evolution in complex domain patterns such as herringbone and checkerboard structures are revealed. Of interest, in the case of a herringbone pattern consisting of two sets of lamellae angled to each other, one set of lamellae expands and is observed to overwrite the other, transforming the herringbone structure into a single lamination. Also, lengthening without broadening, and simultaneous lengthening and broadening of lamellar domain bands in checkerboard structures are observed. The observations show that 180° and non-180° domain switching can occur simultaneously in complex domain patterns. Methods are developed for identifying the polarization directions of the individual domains in near-morphotropic PZT. The methods combine a knowledge of the compatible domain configurations with crystallographic data from electron backscatter diffraction and PFM data. The resulting map of polarization directions enables clear identification of the polarization switching mechanisms.