Compatible domain arrangements and poling ability in oriented ferroelectric films
Compatible domain arrangements and poling ability in oriented ferroelectric films
复制标题
取向铁电薄膜中的兼容畴排列和极化能力
DOI：
10.1007/s00161-010-0136-y
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发表时间：
2010
影响因子：
2.6
通讯作者：
Tsou N
中科院分区：
文献类型：
--
作者：
Tsou N
单晶铁电薄膜的微观结构受衬底条件和薄膜的结晶取向的显著影响。区域排列的形成是为了使总能量最小化，从而产生与外部边界条件相对应的稳定状态。为了寻找低能畴排列，本研究对周期性层压结构采用了精确的相容条件，以确保所有相邻畴能够相容地结合在一起。这些条件适用于具有不同取向和晶体体系的薄膜，如菱面体晶体体系和四方晶体体系。采用系统的搜索方法来发现薄膜中给定宏观应变和极化状态下的精确相容结构。该理论应用于[001]，[011]和[111]取向的菱形和四边形薄膜。结果表明，在保持相容性的前提下，微观结构可以沿着极化路径不断演化，从零透厚极化状态到最大透厚极化状态。显示了畴排列沿这些极化路径的演变，并讨论了极化能力，即最大极化的极限。研究了衬底施加的应变状态对微观组织和极化能力的影响。该模型的使用是通过开发四边形[001]取向薄膜的极化图来说明的，以显示可以作为施加衬底应变的函数实现的极化状态集。
The microstructure in single crystal ferroelectric films is significantly affected by the substrate conditions and the crystallographic orientation of the film. Domain arrangements form to minimize the total energy producing a stable state corresponding to the external boundary conditions. In order to find low energy domain arrangements, this study uses exact compatibility conditions for periodic laminate structures which ensure that all the adjacent domains fit together compatibly. These conditions are applied to films with various orientations and crystal systems, such as the rhombohedral and tetragonal crystal systems. A systematic search is used to discover exactly compatible structures for given states of macroscopic strain and polarization in the film. The theory is applied to [001], [011], and [111] oriented rhombohedral and tetragonal films. The results indicate poling paths along which the microstructure can evolve continuously while maintaining compatibility, to get from a state of zero through-thickness polarization to the state with the greatest value of through-thickness polarization. The evolution of the domain arrangement along these poling paths is shown, and the poling ability, or the limit on the maximum polarization achieved, is discussed. The influence of a strain state imposed by the substrate on the microstructure and poling ability is studied. The use of the model is illustrated by developing poling maps for a tetragonal [001] oriented film to show the set of polarization states that can be achieved as a function of the imposed substrate strain.
影响因子：
2.5
作者：
N. Tsou;J. Huber
通讯作者：
J. Huber
马氏体相变的有效能量和层状显微组织
影响因子：
5.3
作者：
G. Goldsztein
通讯作者：
G. Goldsztein
四方铁电单晶相容微结构的构建
影响因子：
5.3
作者：
N. Tsou;J. Huber
通讯作者：
J. Huber