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全钙钛矿La0.5Sr0.5CoO3/PbZr0.53Ti0.47O3/La0.5Sr0.5CoO3异质结的结构与性能

Structural and Physical Properties of all Perovskite La_(0.5)Sr_(0.5)CoO_3/PbZr_(0.53)Ti_(0.47)O_3/La_(0.5)Sr_(0.5)CoO_3 Heterostructure
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摘要 应用射频磁控溅射法在SrTiO3(STO)基片上制备了全钙钛矿结构La0.5Sr0.5CoO3/PbZr0.53Ti0.47O3/La0.5Sr0.5CoO3(LSCO/PZT/LSCO)电容器异质结,并进行了结构和性能的表征.X射线衍射(XRD)的研究表明,LSCO/PZT/LSCO异质结在SrTiO3(STO)基片上为外延生长.对该电容器铁电性能的研究发现,在5 V驱动电压下,电滞回线饱和趋势良好,矫顽场电压为1.8 V和剩余极化强度为21.5×10-6C/cm2,漏电流为8.9×10-8A/cm2.实验还证实该电容器具有良好的脉冲宽度依赖性及抗疲劳特性. All perovskite La0.5Sr0.5CoO3/PbZr0.53Ti0.47O3/La0.5Sr0.5CoO3 （LSCO/PZT/LSCO） capacitor heterostructure have been fabricated on SrTiO3 （STO）substrate using radio frequency sputtering method, the structural and physical properties of the heterostructure have been investigated. X-ray diffraction analysis （XRD） indicates that LSCO/PZT/LSCO heterostructure is epitaxially grown on SrTiO3 （STO）substrate. Ferroelectric properties are studied, it is found that the hysteresis loop of LSCO/PZT/LSCO capacitor is well saturated at 5 V. The coercive voltage, remnant polarization, and leakage current density are 1.8 V, 21.5 ×10^-6A/cm^2＇ and 8.9×10^-8A/cm^2, respectively. Moreover, LSCO/PZT/LSCO capacitor possesses good pulse width dependence, and fatigue resistance.
作者 郭建新 刘保亭 魏丽静 张新 闫小兵 赵庆勋
机构地区 河北大学物理科学与技术学院 华北电力大学科技学院
出处 《河北大学学报（自然科学版）》 CAS 北大核心 2008年第4期369-372,共4页 Journal of Hebei University(Natural Science Edition)
基金 973前期研究专项(2007CB616910) 教育部科学技术研究重点项目(207013) 河北省自然科学基金重点项目(E2005000130) 河北省科技攻关项目(04213579)
关键词 钙钛矿结构 PZT 异质结 铁电薄膜 perovskite PZT heterostructure ferroelectric film
分类号 O511 [理学—低温物理]
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参考文献17

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二级参考文献35

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共引文献6

河北大学学报（自然科学版）
2008年 第4期

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