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La,Nb共掺杂BiFeO3薄膜中的光致应变效应及应力调控
  • ISSN号：1000-3290
  • 期刊名称：《物理学报》
  • 时间：0
  • 分类：TN304.9[电子电信—物理电子学]
  • 作者机构：[1]上海大学理学院物理系,上海200444, [2]澳大利亚卧龙岗大学电子材料研究所,新南威尔士州2500
  • 相关基金：国家自然科学基金（批准号：11174195）; 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
作者： 徐悦[1], 张泽宇[1], 金钻明[1], 潘群峰[1], 林贤[1], 马国宏[1], 程振祥[1,2]
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, femtosecond pump-probe technology Bi0.8La0.2Fe0.99Nb0.01O3 thin film acoustic phonon strain modulation
中文摘要：

本文利用反射式飞秒抽运-探测技术,系统研究了飞秒激光诱导La和Nb共掺杂的铁酸铋（Bi0.8La0.2Fe0.99Nb0.01O3）薄膜中纵向声学声子的动力学过程,声学声子的产生源于光致应变效应.实验发现不同的衬底（ZrO2和PbMg1/3Nb2/3-PbTiO3）可以调制外延生长的Bi0.8La0.2Fe0.99Nb0.01O3薄膜的面外弹性系数C⊥.此外,通过对压电晶体衬底PbMg1/3Nb2/3-PbTiO3外加电压,实现了对薄膜应力的调制.

英文摘要：

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.

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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876