Title: | Atomic-Scale Visualization of Polarization Pinning and Relaxation at Coherent BiFeO3/LaAlO3 Interfaces |
Authors: | Huang, Rong Ding, Hang-Chen Liang, Wen-I Gao, Yong-Chao Tang, Xiao-Dong He, Qing Duan, Chun-Gang Zhu, Ziqiang Chu, Junhao Fisher, Craig A. J. Hirayama, Tsukasa Ikuhara, Yuichi Chu, Ying-Hao 材料科學與工程學系 Department of Materials Science and Engineering |
Keywords: | bismuth ferrite;annular bright-field imaging;heterointerfaces |
Issue Date: | 1-Feb-2014 |
Abstract: | Complex oxide heterointerfaces, which play host to an incredible variety of interface physical phenomena, are of great current interest in introducing new functionalities to systems. Here, coherent super-tetragonal BiFeO3/LaAlO3 and rhombohedral BiFeO3/LaAlO3 heterointerfaces are investigated by using a combination of high-angle annular dark-field (HAADF) imaging and annular bright-field (ABF) imaging in a spherical aberration (Cs) corrected scanning transmission electron microscope (STEM), and first-principles calculations. The complicated ferroelectric polarization pinning and relaxation that occurs at both interfaces is revealed with atomic resolution, with a dramatic change in structure of BiFeO3, from cubic to super-tetragonal-like. The results enable a detailed explanation to be given of how non-bulk phase structures are stabilized in thin films of this material. |
URI: | http://dx.doi.org/10.1002/adfm.201301470 http://hdl.handle.net/11536/24044 |
ISSN: | 1616-301X |
DOI: | 10.1002/adfm.201301470 |
Journal: | ADVANCED FUNCTIONAL MATERIALS |
Volume: | 24 |
Issue: | 6 |
Begin Page: | 793 |
End Page: | 799 |
Appears in Collections: | Articles |
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