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光照对BiFe_(0.95)Mn_(0.05)O_3薄膜铁电和输运性质的影响 被引量：3

Influence of Light on Ferroelectricity and Transport Properties of BiFe_(0.95)Mn_(0.05)O_3 Film
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摘要 采用溶胶-凝胶法在Pt(111)/Ti/SiO2/Si(001)基片上制备了BiFe0.95Mn0.05O3(BFMO)薄膜,并构架了Pt/SrRuO3/BFMO/Pt型电容器。X射线衍射(XRD)分析发现在650℃快速退火可以得到良好结晶质量的多晶薄膜。紫光入射到薄膜表面,电滞回线发生变化,这是由于光照在薄膜内部产生的光生载流子影响了退极化场的分布。研究表明,在紫光照射下,薄膜的漏电流密度变大,电导由5.1×10-7S增大到6.63×10-7S。通过对暗电流密度的拟合发现,BFMO薄膜为欧姆导电机制。 BiFe0.95Mn0.05O3（BFMO） film was fabricated on Pt（111）/Ti/SiO2/Si（001） substrate by sol-gol method,and a capacitor with a structure of Pt/SrRuO3/BFMO/Pt was constructed.X-ray diffraction（XRD） showed that well-crystallized BFMO film could be obtained at annealing temperature of 650 ℃.Hysteresis loop changed under illumination of purple light,which is taken account for effect of photo-induced carrier in film on depolarized field.Additionally,an increase in leakage current density was observed in purple light.Conductance of BFMO film increased from 5.1×10-7 S to 6.63×10-7 S when illuminated with purple light.Analysis of dark current density suggested that ohmic conduction behavior is the leakage current mechanism.
作者 彭增伟 刘保亭 魏大勇 马继奎 王宽冒 李曼 赵光
机构地区 河北大学物理科学与技术学院 河北省科技工程学校
出处 《人工晶体学报》 EI CAS CSCD 北大核心 2011年第2期388-391,共4页 Journal of Synthetic Crystals
基金 国家自然科学基金(60876055) 河北省自然科学基金(E2008000620) 河北省应用基础研究计划重点项目(10963525D) 高等学校博士点基金(20091301110002)
关键词 光照 BiFe0.95Mn0.05O3薄膜 铁电性质 输运性质 light BiFe0.95Mn0.05O3 film ferroelectricity transport properties
分类号 TQ133 [化学工程—无机化工]
  • 相关文献

参考文献16

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共引文献26

同被引文献39

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引证文献3

二级引证文献5

人工晶体学报
2011年 第2期

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