Lattice-Rotation Vortex at the Charged Monoclinic Domain Boundary in a Relaxor Ferroelectric Crystal

被引：18

作者：

Shao, Yu-Tsun ^{[1
]}

Zuo, Jian-Min ^{[1
,2
]}

机构：

[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 15期

关键词：

PHASE; WALLS; DIFFRACTION; CONDUCTION; RESOLUTION; SYMMETRY; SCALE; ORDER;

D O I：

10.1103/PhysRevLett.118.157601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present evidence of lattice-rotation vortices having an average radius of similar to 7 nm at the ferroelectric domain boundary of (1-x)Pb(Zn-1/3 Nb-2/3)O-3-xPbTiO(3) (x = 0.08). Maps of crystal orientations and domain symmetry breaking are obtained using scanning convergent beam electron diffraction, which show fractional rotation vortices near the 50 degrees monoclinic domain walls. The merging of 2D and 1D topological defects is consistent with inhomogeneous boundary charge and expected to have a large impact on the domain-switching mechanisms in relaxor ferroelectric crystals and ferroelectric devices.

引用

页数：5

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