Flux-closure domain structures in ferroelectric thin films are considered to have potential applications in electronic devices. It is usually believed that these structures are stabilized by the depolarization field and the contact with electrodes tends to screen the depolarization field and may limit their formation. In this work, the influence of oxide electrodes (SrRuO3 and La0.7Sr0.3MnO3) on the formation of flux-closure domains in PbTiO3 thin films deposited on (110)-oriented GdScO3 substrates by pulsed laser deposition was investigated by Cs-corrected transmission electron microscopy. It is found that periodic flux-closure domain arrays can be stabilized in PbTiO3 films when the top and bottom electrodes are symmetric, while a/c domains appear when asymmetric electrodes are applied. The influence of asymmetric electrodes on the domain configuration is proposed to have a connection with their different work functions and conductivity types. These results are expected to shed light on understanding the nature of flux-closure domains in ferroelectrics and open some research possibilities, such as the evolution of these structures under external electric fields.
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Periodic arrays of flux-closure domains in ferroelectric thin films with oxide electrodes
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31 July 2017
Research Article|
July 31 2017
Periodic arrays of flux-closure domains in ferroelectric thin films with oxide electrodes
S. Li;
S. Li
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
2
University of Chinese Academy of Sciences
, Yuquan Road 19, 100049 Beijing, China
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Y. L. Zhu
;
Y. L. Zhu
a)
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
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Y. J. Wang;
Y. J. Wang
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
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Y. L. Tang;
Y. L. Tang
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
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Y. Liu;
Y. Liu
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
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S. R. Zhang;
S. R. Zhang
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
2
University of Chinese Academy of Sciences
, Yuquan Road 19, 100049 Beijing, China
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J. Y. Ma;
J. Y. Ma
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
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X. L. Ma
X. L. Ma
1
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
, Wenhua Road 72, 110016 Shenyang, China
3
School of Materials Science and Engineering, Lanzhou University of Technology
, Langongping Road 287, 730050 Lanzhou, China
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a)
Author to whom correspondence should be addressed: ylzhu@imr.ac.cn
Appl. Phys. Lett. 111, 052901 (2017)
Article history
Received:
April 26 2017
Accepted:
June 21 2017
Citation
S. Li, Y. L. Zhu, Y. J. Wang, Y. L. Tang, Y. Liu, S. R. Zhang, J. Y. Ma, X. L. Ma; Periodic arrays of flux-closure domains in ferroelectric thin films with oxide electrodes. Appl. Phys. Lett. 31 July 2017; 111 (5): 052901. https://doi.org/10.1063/1.4996232
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