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题名: Large Scale Two-Dimensional Flux-Closure Domain Arrays in Oxide Multilayers and Their Controlled Growth
作者: Liu, Ying;  Wang, Yu-Jia;  Zhu, Yin-Lian;  Lei, Chi-Hou;  Tang, Yun-Long;  Li, Shuang;  Zhang, Si-Rui;  Li, Jiangyu;  Ma, Xiu-Liang
发表日期: 2017-12-1
摘要: Ferroelectric flux-closures are very promising in high-density storage and other nanoscale electronic devices. To make the data bits addressable, the nanoscale flux-closures are required to be periodic via a controlled growth. Although flux-closure quadrant arrays with 180 degrees domain walls perpendicular to the interfaces (V-closure) have been observed in strained ferroelectric PbTiO3 films, the flux-closure quadrants therein are rather asymmetric. In this work, we report not only a periodic array of the symmetric flux-closure quadrants with 180 degrees domain walls parallel to the interfaces (H-closure) but also a large scale alternative stacking of the V- and H-closure arrays in PbTiO3/SrTiO3 multilayers. On the basis of a combination of aberration-corrected scanning transmission electron microscopic imaging and phase field modeling, we establish the phase diagram in the layer-by-layer two-dimensional arrays versus the thickness ratio of adjacent PbTiO3 films, in which energy competitions play dominant roles. The manipulation of these flux-closures may stimulate the design and development of novel nanoscale ferroelectric devices with exotic properties.
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Recommended Citation:
Liu, Ying,Wang, Yu-Jia,Zhu, Yin-Lian,et al. Large Scale Two-dimensional Flux-closure Domain Arrays In Oxide Multilayers And Their Controlled Growth[J]. Amer Chemical Soc,2017,17(12):7258-7266.

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