Modeling on domain switching in ferroelectric ceramics near the   morphotropic phase boundary

doi:10.1063/1.3153282

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	Modeling on domain switching in ferroelectric ceramics near the morphotropic phase boundary
	Li, F. X. ; Li, Y. W.
刊名	应用物理杂志
	2009
关键词	SINGLE-CRYSTALS PZT CERAMICS STRAIN FIELD ORIENTATION BEHAVIOR TEXTURE
DOI	10.1063/1.3153282
英文摘要	In this paper, domain switching in ferroelectric ceramics near the morphotropic phase boundary (MPB), where tetragonal phase and rhombohedral phase coexist, is analyzed by a micromechanical model using an inverse-pole-figure (IPF) method. Charge screening effect in ferroelectric ceramics is taken into account, thus the depolarization field by polarization switching vanishes. The mechanical constraint caused by non-180 degrees switching, however, cannot be neglected and is assumed to be proportional to the switching strain caused by non-180 degrees domain switching with a factor beta as the measure of the constrained level. Using the IPF method, the domain switching induced polarization and strain can be explicitly obtained via integrations over the unit spherical surface. Two limiting cases are studied in this paper, i.e., the energy barrier for the interphase non-180 degrees domain switching is equal to or much larger than that for the in-phase non-180 degrees switching. In the former case, it is found that domains always tend to switch to the rhombohedral phase especially when the constrained level is high, i.e., at a large value of beta. If the mechanical constraint is neglected, i.e., beta = 0, the maximum achievable polarization and strain can be analytically obtained in this case. While in the latter case, interphase domain switching is suppressed, thus domain switching in MPB ceramics is only a superposition of independent in-phase domain switching in tetragonal ceramics and rhombohedral ceramics. (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3153282]; Physics, Applied; SCI(E); EI; 5; ARTICLE; 12; 105
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154975]
专题	工学院
推荐引用方式 GB/T 7714	Li, F. X.,Li, Y. W.. Modeling on domain switching in ferroelectric ceramics near the morphotropic phase boundary[J]. 应用物理杂志,2009.
APA	Li, F. X.,&Li, Y. W..(2009).Modeling on domain switching in ferroelectric ceramics near the morphotropic phase boundary.应用物理杂志.
MLA	Li, F. X.,et al."Modeling on domain switching in ferroelectric ceramics near the morphotropic phase boundary".应用物理杂志 (2009).