Phenomenological model of a 90° domain wall in BaTiO3-type ferroelectrics
Phenomenological model of a 90° domain wall in BaTiO3-type ferroelectrics
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DOI：
10.1103/physrevb.74.104104
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发表时间：
2006-09-01
影响因子：
3.7
通讯作者：
Marton, P.
中科院分区：
文献类型：
--
作者：
Hlinka, J.;Marton, P.
在唯象的Ginzburg-Landau-Devonshire模型框架下，分析了四元BaTiO_3类晶体中的铁电-铁弹孪晶界的性质。特别注意的是梯度和偶极-偶极项，这取决于非均匀极化的介绍和赞赏。调整的模型参数的钛酸钡的散装性能，使我们能够定量预测畴壁的轮廓和宽度（在环境条件下，3.6 nm和0.6 nm的完全放松90度和180度畴壁）。
The properties of ferroelectric-ferroelastic twin boundaries in tetragonal BaTiO3-like crystals are analyzed in the framework of the phenomenological Ginzburg-Landau-Devonshire model. Special attention is paid to the introduction and appreciation of the gradient and dipole-dipole terms, which depends on inhomogeneous polarization. An adjustment of the model parameters to the bulk properties of BaTiO3 allows us to make quantitative predictions for domain-wall profiles and widths (at ambient conditions, 3.6 nm and 0.6 nm for fully relaxed 90 degrees and 180 degrees domain walls).