A study of electromechanical switching in ferroelectric single crystals
A study of electromechanical switching in ferroelectric single crystals
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DOI：
10.1016/j.jmps.2008.02.004
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发表时间：
2008-06
影响因子：
5.3
通讯作者：
J. Yen;Y. Shu;J. Shieh;J. Yeh
中科院分区：
文献类型：
--
作者：
J. Yen;Y. Shu;J. Shieh;J. Yeh
本文记录了为研究铁电单晶的开关行为而进行的模型和实验研究。该理论模型先验地分析了切换遵循特定领域模式的演化。这种配置的选择取决于在进化过程中域保持兼容的要求，从而为整体切换提供了低能量路径。这种图案的构造是使用多层层压板实现的。它提供了指定不同类型的域壁运动的优点，导致切换类型的区分。采用恒压应力和循环电场对钛酸钡（BaTiO3）单晶进行了加载实验。180°和90°的矫顽力场作为理论框架所需的输入参数进行测量。模拟结果与本实验和其他实验的实测应变值吻合较好。发现去极化对可达到的驱动应变有不小的影响。
This article documents both modeling and experimental studies developed to investigate the switching behavior of ferroelectric single crystals. The theoretical model makes a priori ansatz that switching follows the evolution of a particular domain pattern. The choice of this configuration is dictated by the requirement that domains remain compatible during evolution, giving rise to a low-energy path for the overall switching. The construction of this pattern is achieved using multirank laminates. It offers an advantage of specifying different types of domain wall movements, leading to a distinction for the switching types. A loading experiment is performed on a barium titanate (BaTiO3) single crystal with a constant compressive stress and a cyclic electric field. Both 180∘and 90∘coercive fields are measured as input parameters required for the theoretical framework. The simulation results show good agreement with the observed strains measured by the present and other available experiments. It is found that depolarization has a non-trivial influence on attainable actuation strains.