领域(数学分析)
动力学(音乐)
磁畴壁(磁性)
物理
极化(电化学)
极性(国际关系)
化学物理
作者
Christopher T. Nelson,Peng Gao,Jacob R. Jokisaari,Colin Heikes,Carolina Adamo,Alexander Melville,Seung Hyub Baek,Chad M. Folkman,B. Winchester,Yijia Gu,Yuanming Liu,Kui Zhang,Enge Wang,Jiangyu Li,Long Qing Chen,Chang-Beom Eom,Darrell G. Schlom,Xiaoqing Pan
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2011-11-18
卷期号:334 (6058): 968-971
被引量:270
标识
DOI:10.1126/science.1206980
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.
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