物理学报Issue(11)：1-6,6.DOI:10.7498/aps.63.117801
La，Nb共掺杂BiFeO3薄膜中的光致应变效应及应力调控
Transient photostriction and strain mo dulation in La, Nb-co dop ed BiFeO3 thin films
摘要
Abstract
Coherent longitudinal acoustic phonons in Bi0.8La0.2Fe0.99Nb0.01O3 (BLFNO) films are photo-induced and detected by the femtosecond time-resolved reflectance spectroscopy. The generation mechanism of coherent longitudinal acoustic phonons is attributed to the transient photostriction effect. The strain modulation of the out-of-plane elastic properties C⊥ is realized in BLFNO films deposited on different substrates (ZrO2 and PbMg1/3Nb2/3-PbTiO3). Strain modulation of the thin film is demonstrated by applying an electromotive force on the piezoelectric substrate PbMg1/3Nb2/3-PbTiO3.关键词
飞秒抽运-探测技术/Bi0.8La0.2Fe0.99Nb0.01O3薄膜/声学声子/应力调控Key words
femtosecond pump-probe technology/Bi0.8La0.2Fe0.99Nb0.01O3 thin film/acoustic phonon/strain modulation引用本文复制引用
徐悦,张泽宇,金钻明,潘群峰,林贤,马国宏,程振祥..La，Nb共掺杂BiFeO3薄膜中的光致应变效应及应力调控[J].物理学报,2014,(11):1-6,6.基金项目
国家自然科学基金(批准号:11174195)和高等学校博士点专项科研基金(博导类)(批准号:20123018110003)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant No.11174195), and the Ph.D. Programs Foundation of Ministry of Education of China (Grant No.20123108110003) （批准号:11174195）
