搜索到77篇“ ELECTRORESISTANCE“的相关文章
Greatly enhanced tunneling electroresistance in ferroelectric tunnel junctions with a double barrier design
2023年
We propose that the double barrier effect is expected to enhance the tunneling electroresistance(TER)in the ferroelectric tunnel junctions(FTJs).To demonstrate the feasibility of this mechanism,we design a model structure of Pt/BaTiO_(3)/LaAlO_(3)/Pt/BaTiO_(3)/LaAlO_(3)/Pt double barrier ferroelectric tunnel junction(DB-FTJ),which can be considered as two identical Pt/BaTiO_(3)/LaAlO_(3)/Pt single barrier ferroelectric tunnel junctions(SB-FTJs)connected in series.Based on density functional calculation,we obtain the giant TER ratio of 2.210×10^(8)%in the DB-FTJ,which is at least three orders of magnitude larger than that of the SB-FTJs of Pt/BaTiO_(3)/LaAlO_(3)/Pt,together with an ultra-low resistance area product(0.093 KΩμm^(2))in the high conductance state of the DB-FTJ.Moreover,it is possible to control the direction of polarization of the two single ferroelectric barriers separately and thus four resistance states can be achieved,making DB-FTJs promising as multi-state memory devices.
Wei XiaoXiaohong ZhengHua HaoLili KangLei ZhangZhi Zeng
关键词:JUNCTIONSPOLARIZATIONFERROELECTRIC
温度对铁电隧道结隧穿电阻效应的影响
2020年
采用脉冲激光沉积与磁控溅射技术制备Pt/Pb(Zr0.2Ti0.8)O3/Nb:SrTiO3铁电隧道结,研究环境温度对隧道结隧穿电阻效应的影响.结果表明:随环境温度的增加,隧穿电阻比值减小,这可归结为热发射机制的增强削弱了高低阻态间的差别.
王一豪陈赓章天金马志军
关键词:温度
铝/铁掺杂的非晶碳/铝结构的电致电阻效应研究
2018年
采用脉冲激光沉积方法在石英玻璃衬底上沉积铁掺杂的非晶碳膜(a-C∶Fe),然后使用真空热蒸发设备在膜上镀铝(Al)电极层,形成Al/a-C∶Fe/Al结构的器件。该器件在±5 V测试电压范围内显示出可逆电致电阻效应,具有较好的开关电压、开关比等参数,可用作电阻型随机存储器。
臧婷玉吉帅翟章印
关键词:非晶碳
揭开Nb:SrTiO3阻阻变效应的潘多拉盒子
2018年
本世纪初,纪元轮回,但万物却无法归于原始,我们的欲望依然是“更高、更快、更强”。人类一方面对大数据有无止境追求,另一方面又懒于亲力亲为,使得对物联网等新行业需求非线性上升。
樊贞
关键词:SRTIO3盒子NB非线性物联网
Electric current-induced giant electroresistance in La0.36Pr0.265Ca0.375MnO3 thin films
2017年
The electroresistance(ER) of La_(0.36)Pr_(0.265)Ca_(0.375)MnO_3(LPCMO) epitaxial thin film was studied under various dc currents.The current effect was compared for the unpatterned film and patterned microbridge with a width of 50 μm.The value of ER in the unpatterned LPCMO film could reach 0.54 under a 1-mA current,which is much higher than ER under 1 mA for the patterned weak phase-separated La_(0.67)Ca_(0.33)MnO_3 and La_(0.85)Sr_(0.15)MnO_3 microbridges with 50-μm width.More interestingly,for the patterned LPCMO microbridge,the maximum of ER can reach 0.6 under a small current of 100 μ.A.The results were explained by considering the coexistence of ferromagnetic metallic phase with the charge-ordered phase,and the variation of the phase separation with electric current.
孙颖慧赵永刚王荣明
关键词:MANGANITESELECTRORESISTANCEPERCOLATION
La_(0.4)Ca_(0.6)Mn_(0.98)Ru_(0.02)O_3中的电致电阻效应研究
2016年
单相多晶锰氧化物样品La_(0.4)Ca_(0.6)Mn_(0.98)Ru_(0.02)O_3具有典型的电子相分离基态,即低温下铁磁金属相与电荷有序绝缘相共存并竞争,这为我们研究电致电阻效应提供了很好的模型。本论文基于此目的,采用固相合成法制备了La_(0.4)Ca_(0.6)Mn_(0.98)Ru_(0.02)O_3的多晶陶瓷样品,用X射线衍射证明了样品是单相,并详细测量了样品的电致电阻效应。实验结果表明,该体系的电阻率能够在大范围内被输入电流调控,获得的电致电阻效应高达80%以上。此外,低温下该样品的电阻态可以通过改变电流输入强度进行连续转换,反映了样品基态在电流的激发下发生了改变。通过讨论,我们认为这些观测到的物理效应起源于输入电流提升了样品中的铁磁金属相的稳定性。
别业广胡妮刘丰铭段天赐裴玲邓罡
关键词:锰氧化物电输运
Influence of interface within the composite barrier on the tunneling electroresistance of ferroelectric tunnel junctions with symmetric electrodes被引量:1
2015年
The interface with a pinned dipole within the composite barrier in a ferroelectric tunnel junction(FTJ) with symmetric electrodes is investigated.Different from the detrimental effect of the interface between the electrode and barrier in previous studies,the existence of an interface between the dielectric SrTiO_3 slab and ferroelectric BaTiO_3 slab in FTJs will enhance the tunneling electroresistance(TER) effect.Specifically,the interface with a lower dielectric constant and larger polarization pointing to the ferroelectric slab favors the increase of TER ratio.Therefore,interface control of high performance FTJ can be achieved.
王品之朱素华潘涛吴银忠
Au/BaTiO_3/SrRuO_3异质结的制备与电致电阻效应研究
2014年
异质结的高低阻态可以分别代表逻辑"0"和"1",从而实现二进制数据存储.采用磁控溅射法制备Au/BaTiO3/SrRuO3异质结.研究结果表明在不同工艺条件下制备的BaTiO3薄膜均具有(002)择优取向.电学测试表明:在较低气压下制备的薄膜,异质结中可以实现可逆的单极性到双极性电阻转变;在较高气压下制备的薄膜,异质结中可以实现不可逆的非对称双极性电阻转变.这些实验结果可以用界面调制的随机断路器网络模型统一解释.
褚慧芳梁坤马志军章天金吴冰杨超
关键词:钛酸钡异质结
Emergent reversible giant electroresistance in spacially confined La_(0.325)Pr_(0.3)Ca_(0.375)MnO_3 wires
2014年
Micro-patterning is considered to be a promising way to analyze phase-separated manganites. We investigate resistance in micro-patterned La0.325Pr0.3Ca0.375MnO3 wires with width of 10 μm, which is comparable to the phase separation scale in this material. A reentrant of insulating state at the metal-insulator temperature Tp is observed and a giant resistance change of over 90% driven by electric field is achieved by suppression of this insulating state. This resistance change is mostly reversible, The I-V characteristics are measured in order to analyze the origin of the giant electroresistance and two possible explanations are proposed.
崔丽敏李洁王佳张玉郑东宁
关键词:MANGANITES
薄膜厚度对PZT/STO铁电电容器隧穿电阻的影响被引量:1
2013年
结合Landau-Devonshire自由能理论和晶格模型,研究了PbZr1-xTixO3(PZT)/SrTiO3(STO)复合薄膜中PZT和STO厚度对铁电隧道结极化强度、电导和隧穿电阻等的影响。模拟结果表明,随着层数增加,极化强度增大;平均极化强度随着PZT厚度增加而增强,随着STO厚度增加而减弱;随着PZT和STO厚度增加,电导减小,隧穿电阻率增加;当厚度变化相同时,PZT引起电导的变化大,隧穿电阻率变化小。考虑薄膜面积的影响,当薄膜面积从无限大变成有限大时,极化强度、电导和隧穿电阻均减小。
王英龙刘林张鹏程梁伟华丁学成褚立志邓泽超
关键词:铁电电容器隧穿效应PZT

相关作者

孙颖慧
作品数:10被引量:0H指数:0
供职机构:清华大学
研究主题:金属颗粒 复合膜 基底 拉曼散射 膜结构