Orientation and stability of domain walls in ferroelectric crystals

Liu Yunya; Li Jiangyu; Liu Jinjin; Xie Shuhong

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Orientation and stability of domain walls in ferroelectric crystals

Liu Yunya 1 #,Li Jiangyu 2 * #,Liu Jinjin 1,Xie Shuhong 1

1.Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Faculty of Materials, Optoelectronics and Physics, Xiangtan University

2.Department of Mechanical Engineering,University of Washington

*Correspondence author

#Submitted by

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Funding: 国家自然科学基金，国家自然科学基金，教育部博士点基金，湖南省自然科学基金，湖南省自然科学基金（No.10772155,10732100,20050530004,07JJ1008,08C864）

Opened online: 9 January 2009

Accepted by: none

Citation: Liu Yunya,Li Jiangyu,Liu Jinjin.Orientation and stability of domain walls in ferroelectric crystals[OL]. [ 9 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27573

An equivalent inclusion method is developed to predict ferroelectric domain structures. It considers energy variation in tetragonal and rhombohedral single crystals when a new domain appears in them. Stable lamellar domain pattern and different domain wall orientations have been identified with energy minimizing. The steady uncharged domain walls and metastable charged domain walls in tetragonal crystals with $90^\\circ$ domain pattern and rhombohedral crystal with $71^circ$ and $109^circ$ domain patterns are analyzed respectively, and the results agree well with those observed in experiments. The action of transformation strain, spontaneous polarization and piezoelectric strain for ferroelectric domain configurations are presented.

Keywords:domain wall，ferroelectric crystal,domain structure,inclusion,energy

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