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Title: Periodic elastic nanodomains in ultrathin tetragonal-like BiFeO3 films
Authors: Luo, Zhenlin
Chen, Zuhuang
Yang, Yuanjun
Liu, Heng-Jui
Huang, Chuanwei
Huang, Haoliang
Wang, Haibo
Yang, Meng-Meng
Hu, Chuansheng
Pan, Guoqiang
Wen, Wen
Li, Xiaolong
He, Qing
Sritharan, Thirumany
Chu, Ying-Hao
Chen, Lang
Gao, Chen
Keywords: DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films
Issue Date: 2013
Source: Luo, Z., Chen, Z., Yang, Y., Liu, H.-J., Huang, C., Huang, H., et al. (2013). Periodic elastic nanodomains in ultrathin tetragonal-like BiFeO3 films. Physical Review B, 88(6), 064103.
Series/Report no.: Physical review B
Abstract: We present a synchrotron grazing incidence x-ray diffraction analysis of the domain structure and polar symmetry of highly strained BiFeO3 (BFO) thin films grown on LaAlO3 substrate. We reveal the existence of periodic elastic nanodomains in the pure tetragonal-like BFO ultrathin films down to a thickness of 6 nm. A unique shear strain-accommodation mechanism is disclosed. We further demonstrate that the periodicity of the nanodomains increases with film thickness but deviates from the classical square root law in the ultrathin thickness regime (6–30 nm). Temperature-dependent experiments further reveal the disappearance of periodic modulation above ∼90 °C due to a MC-MA structural phase transition.
DOI: 10.1103/PhysRevB.88.064103
Schools: School of Materials Science & Engineering 
Rights: © 2013 American Physical Society. This paper was published in Physical Review B - Condensed Matter and Materials Physics and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: [].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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