Hierarchical-vortex polarization domain pattern in nano polycrystalline ferroelectric

被引：2
|
作者：
Huang, Zhiyong [1 ,2 ]
Li, Qinan [1 ]
Liang, Yin [3 ]
He, Xiaoqiao [4 ]
Wu, Jiagang [5 ]
Fan, Haidong [2 ]
Tian, Xiaobao [2 ]
机构：
[1] Sichuan Univ, Sch Aeronaut & Astronaut, Chengdu 610065, Peoples R China
[2] Sichuan Univ, Dept Mech, Chengdu 610065, Peoples R China
[3] Sichuan Univ, Dept Civil Engn, Chengdu 610065, Peoples R China
[4] City Univ Hong Kong, Dept Architecture & Civil Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
[5] Sichuan Univ, Dept Mat Sci, Chengdu 610065, Peoples R China
来源：
JOURNAL OF ADVANCED DIELECTRICS | 2022年 / 12卷 / 04期
关键词：
Domain pattern; hierarchical vortex; polycrystalline; grain boundary; self-consistent; EVOLUTION;
D O I：
10.1142/S2010135X22500096
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Domain pattern is the carrier of electromechanical property. A novel domain pattern will open a gate for ferroelectric nanodevice. A distinctive topological domain pattern termed as hierarchical vortex (Hvo) has been found in polycrystalline ferroelectric based on the first-principles-based atomistic method. The Hvo pattern displays a unique structure, which is a flux-closing vortex encircle an anti-vortex or a vortex and anti-vortex pair (VA). Each Hvo structure could be regarded as a single vortex to forming a vortex-anti-vortex pair with anti-vortex or forming a vortex-vortex array with the vortex. The mechanism of HVo obtained in polycrystalline ferroelectric has been found that the grain boundary (GB) equals the domain wall when the first-order vortex is in the vortex. The HVo will open a new view of the domain topology pattern and its evolution.
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页数：6
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