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PZT薄膜电滞回线测试的数值补偿研究 总被引:2,自引:0,他引:2
通过Sawyer-Tower测试电路研究了铁电薄膜的电滞回线,发现薄膜漏电阻以及示波器输入电阻和电容的影响可能会使所测量的电滞回线发生形状扭曲或者使测量结果出现较大偏差,通过数值补偿方法重建了电荷平衡方程,并编制了相应的软件补偿程序。通过对溶胶-凝胶制备的PZT铁电薄膜的电滞回线测试表明,运用该数值补偿方法可以有效补偿薄膜漏电阻以及示波器输入电阻和电容对测试结果的影响,满足PZT铁电薄膜制备技术以及微机电系统中器件设计对薄膜性能测试的要求。 相似文献
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铁电阵列在红外探测器、非挥发性存储器中具有重要应用。随着大面积、微格点铁电阵列制备技术的发展,评价亚微米、甚至纳米级微小格点的铁电特性对于铁电器件的设计和制造具有重要意义。本研究将铁电仪和扫描探针显微镜相连,在扫描探针显微镜的AFM模式下,采用带有导电涂层的探针,通过扫描获得铁电阵列的三维像。据此图像,可以把探针定位于特定的微小格点上,由铁电仪通过AFM探针提供电压,并经探针悬臂梁将测试信号反馈给铁电仪,在无顶电极的情况下就可以获得微小铁电格点的电滞回线。 相似文献
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采用与时间有关的Ginzburg-Landau方程,在考虑表面效应的条件下研究了晶格失配应变对外延铁电薄膜铁电性能的影响,通过外推长度考虑表面效应。获得了不同应变情况下的铁电薄膜电滞回线及蝶形应变迟滞回线。结果表明,剩余极化强度和矫顽场与压应变和张应变密切相关,其值强烈依赖于晶格失配应变。 相似文献
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采用MOCVD与快速退火工艺,制备高度择优取向的Bi4Ti3O12铁电薄膜.运用x射线衍射术分析薄膜材料的结构,x射线显微分析仪测量薄膜材料的组分,并通过电滞回线的测量,研究快速退火对Bi4Ti 3O12薄膜结构和铁电性的影响. 相似文献
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The article describes a model representation of radar probing data in form of a mixture of background and target samples, which is the sum of two random variables with very different parameters. For model development we research the behavior of the central moments of the distribution mix without assuming the distribution law form. An example it is described the detection of the signal at the output of compression system of chirp ionosonde. 相似文献
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解决IP网QoS问题是目前通信领域的研究热点之一.虽然研究已经取得了一定的进展,但人们对于IP 网QoS本身的含义及相关的问题还有着不同的理解.本文将从IP网QoS的定义入手讨论相关的一些问题以及解决IP网QoS问题所做的各种努力. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1968,56(6):1024-1032
Assuming that visual responses are due to the action of particles on the membrane of the visual cells, the stochastic variability of the response should be a function of the number of particles producing it. Quantitative predictions can be made with the aid of a model proposed in previous articles. It is found that responses produced in visual cells of Limulus by absorption of a single photon have the stochastic properties which would be expected if the response to one photon were brought about by 25 particles. It is concluded from this that the processes leading to visual responses produce multiplication of particles. The effects of temperature and of metabolic poisons suggest that these processes are of chemical nature. 相似文献
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对影响镍镀层内应力的因素做了介绍和分析,提出了对收缩应力的一种解释,提供了排除这些因素影响的方法,指出重视镀液的管理是减少各种影响内应力因素的主要办法。 相似文献
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罗晓羽 《信息技术与标准化》2008,(6):37-39
论述了推进电子行业标准制修订项目计划管理信息化的必要性.并提出了具体措施;详细介绍了电子行业标准制修订项目计划管理数据库的设计思路和实现方法.阐述了对后续工作的几点思考. 相似文献
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By means of exact conformal mapping method we have defined character of dependence of squares amounts of angular part of film
element on angled part dimension. We propose relations, approximating obtained dependence. Calculation results and experimental
researches of large-scale models are represented. 相似文献
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Moshrefzadeh R.S. Radcliffe M.D. Lee T.C. Mohapatra S.K. 《Lightwave Technology, Journal of》1992,10(4):420-425
The temperature dependence of refractive index of polymer films was determined for a number of slab waveguides by a grating coupling method. This dependence was examined as a function of parameters such as molecular weight and glass transition temperature of the polymer. Temperature-induced changes in N TE-N TM , N being the effective index, were studied systematically for different slab waveguide compositions. It is shown that with proper device design and choice of polymeric materials, thermal effects can be reduced 相似文献
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水的光学特性对光学成像质量有着重要的影响,水对光的吸收、散射作用可造成光在水介质传播中的衰减,本文就水的光学特性及其对水下光学成像质量的影响进行了分析,以为成像系统在水下的应用提供基础的理论依据。 相似文献