摘要
We studied ultrafast dynamics and photoinduced mechanical strain of BiFeO 3 thin films by dual-color transient reflectivity measurements (ΔR/R). Anisotropic photostriction in BiFeO 3 is found to be mainly driven by the optical rectification effect. Results of the photostriction at various thicknesses show that the estimated sound velocity along [110] direction of BiFeO 3 is 4.76 km/s.
原文 | English |
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文章編號 | 041902 |
頁數 | 4 |
期刊 | Applied Physics Letters |
卷 | 101 |
發行號 | 4 |
DOIs | |
出版狀態 | Published - 23 7月 2012 |