Domain Dynamics During Ferroelectric Switching

被引：335

作者：

Nelson, Christopher T. ^{[1
]}

Gao, Peng ^{[1
]}

Jokisaari, Jacob R. ^{[1
]}

Heikes, Colin ^{[2
]}

Adamo, Carolina ^{[2
]}

Melville, Alexander ^{[2
]}

Baek, Seung-Hyub ^{[3
]}

Folkman, Chad M. ^{[3
]}

Winchester, Benjamin ^{[4
]}

Gu, Yijia ^{[4
]}

Liu, Yuanming ^{[5
]}

Zhang, Kui ^{[1
]}

Wang, Enge ^{[6
]}

Li, Jiangyu ^{[5
]}

Chen, Long-Qing ^{[4
]}

Eom, Chang-Beom ^{[3
]}

Schlom, Darrell G. ^{[2
,7
]}

Pan, Xiaoqing ^{[1
]}

机构：

[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[2] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

[3] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

[4] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[5] Univ Washington, Dept Mech Engn, Seattle, WA 98195 USA

[6] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[7] Kavli Inst Cornell Nanoscale Sci, Ithaca, NY 14853 USA

来源：

SCIENCE | 2011年 / 334卷 / 6058期

基金：

美国国家科学基金会;

关键词：

MECHANISM; NUCLEATION; CRYSTAL; FILMS;

D O I：

10.1126/science.1206980

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The utility of ferroelectric materials stems from the ability to nucleate and move polarized domains using an electric field. To understand the mechanisms of polarization switching, structural characterization at the nanoscale is required. We used aberration-corrected transmission electron microscopy to follow the kinetics and dynamics of ferroelectric switching at millisecond temporal and subangstrom spatial resolution in an epitaxial bilayer of an antiferromagnetic ferroelectric (BiFeO3) on a ferromagnetic electrode (La0.7Sr0.3MnO3). We observed localized nucleation events at the electrode interface, domain wall pinning on point defects, and the formation of ferroelectric domains localized to the ferroelectric and ferromagnetic interface. These results show how defects and interfaces impede full ferroelectric switching of a thin film.

引用

页码：968 / 971

页数：5

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