Direct Observation of Ferroelectric Domain Walls in LiNbO3: Wall-Meanders, Kinks, and Local Electric Charges

被引：77

作者：

Gonnissen, Julie ^{[1
]}

Batuk, Dmitry ^{[1
]}

Nataf, Guillaume F. ^{[2
,3
]}

Jones, Lewys ^{[4
]}

Abakumov, Artem M. ^{[1
,5
]}

Van Aert, Sandra ^{[1
]}

Schryvers, Dominique ^{[1
]}

Salje, Ekhard K. H. ^{[6
]}

机构：

[1] Univ Antwerp, Electron Microscopy Mat Sci EMAT, Groenenborgerlaan 171, B-2020 Antwerp, Belgium

[2] Luxembourg Inst Sci & Technol, Mat Res & Technol Dept, 41 Rue Brill, L-4422 Belvaux, Luxembourg

[3] Univ Paris Saclay, CNRS, CEA, SPEC,CEA Saclay, F-91191 Gif Sur Yvette, France

[4] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[5] Skolkovo Inst Sci & Technol, Ctr Electrochem Energy Storage, Nobelya Str 3, Moscow 143026, Russia

[6] Univ Cambridge, Dept Earth Sci, Downing St, Cambridge CB1 3EQ, England

来源：

ADVANCED FUNCTIONAL MATERIALS | 2016年 / 26卷 / 42期

基金：

英国工程与自然科学研究理事会;

关键词：

LITHIUM-NIOBATE; STRUCTURE PARAMETERS; THIN-FILMS; MICROSCOPY; BOUNDARIES; CONDUCTION; CONTRAST; IMAGES; OXIDE; SEM;

D O I：

10.1002/adfm.201603489

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Direct observations of the ferroelectric domain boundaries in LiNbO3 are performed using high-resolution high-angle annular dark field scanning transmission electron microscopy imaging, revealing a very narrow width of the domain wall between the 180 degrees domains. The domain walls demonstrate local side-way meandering, which results in inclinations even when the overall wall orientation follows the ferroelectric polarization. These local meanders contain kinks with "head-to-head" and "tail-to-tail" dipolar configurations and are therefore locally charged. The charged meanders are confined to a few cation layers along the polarization direction and are separated by longer stretches of straight domain walls.

引用

页码：7599 / 7604

页数：6

共 45 条

[1] DEFECT STRUCTURE DEPENDENCE ON COMPOSITION IN LITHIUM-NIOBATE [J].