标题: Periodic elastic nanodomains in ultrathin tetragonal-like BiFeO3 films
作者: 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
材料科学与工程学系
Department of Materials Science and Engineering
公开日期: 26-八月-2013
摘要: 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 similar to 90 degrees C due to a M-C-M-A structural phase transition.
URI: http://dx.doi.org/10.1103/PhysRevB.88.064103
http://hdl.handle.net/11536/22543
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.88.064103
期刊: PHYSICAL REVIEW B
Volume: 88
Issue: 6
起始页: 0
结束页: 0
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