Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5347325 | Applied Surface Science | 2017 | 16 Pages |
Abstract
A highly strained tetragonal (T)-like BiFeO3 (BFO) phase interspersed between two rhombohedral (R)-like phase regions in BFO films grown on LaAlO3 substrates was confirmed by transmission electron microscopy (TEM). The typical width of the T-like phase was about 5-35 nm and the areal fraction of the T-like phase was estimated to be 35%. A lattice misalignment of 3.8° between adjacent R- and T-like phases was observed in both high-resolution TEM images and selected-area electron diffraction patterns. Superlattice reflection spots were observed along the [110] direction in the R-like phase, which were attributed to the antiphase tilting of oxygen octahedra about the pseudocubic [111] axis of the R-like phase. A structural phase transition from the T-like phase to the R-like one at around 435 °C was observed by TEM during in situ heating and cooling experiments.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Yizhong Guo, Ying Liu, Yajun Qi, Jinzhao Wang, Kun Liang, Tianjin Zhang,