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Resistive switching behavior and mechanism of HfO_(x) films with large on/off ratio by structure design
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作者 黄香林 王英 +2 位作者 黄慧香 段理 郭婷婷 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第1期660-665,共6页
Different bilayer structures of HfO_(x)/Ti(TiO_(x)) are designed for hafnium-based memory to investigate the switching characteristics. The chemical states in the films and near the interface are characterized by x-ra... Different bilayer structures of HfO_(x)/Ti(TiO_(x)) are designed for hafnium-based memory to investigate the switching characteristics. The chemical states in the films and near the interface are characterized by x-ray photoelectron spectroscopy,and the oxygen vacancies are analyzed. Highly improved on/off ratio(~104) and much uniform switching parameters are observed for bilayer structures compared to single layer HfO_(x) sample, which can be attributed to the modulation of oxygen vacancies at the interface and better control of the growth of filaments. Furthermore, the reliability of the prepared samples is investigated. The carrier conduction behaviors of HfO_(x)-based samples can be attributed to the trapping and de-trapping process of oxygen vacancies and a filamentary model is proposed. In addition, the rupture of filaments during the reset process for the bilayer structures occur at the weak points near the interface by the recovery of oxygen vacancies accompanied by the variation of barrier height. The re-formation of fixed filaments due to the residual filaments as lightning rods results in the better switching performance of the bilayer structure. 展开更多
关键词 HfO_(x)film resistive switching structure design interface modulation
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Enhanced resistance switching stability of transparent ITO/TiO_2/ITO sandwiches 被引量:1
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作者 孟洋 张培健 +5 位作者 刘紫玉 廖昭亮 潘新宇 梁学锦 赵宏武 陈东敏 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第3期503-507,共5页
We report that fully transparent resistive random access memory (TRRAM) devices based on ITO/TiO2/ITO sandwich structure, which are prepared by the method of RF magnetron sputtering, exhibit excellent switching stab... We report that fully transparent resistive random access memory (TRRAM) devices based on ITO/TiO2/ITO sandwich structure, which are prepared by the method of RF magnetron sputtering, exhibit excellent switching stability. In the visible region (400 800 nm in wavelength) the TRRAM device has a transmittance of more than 80%. The fabricated TRRAM device shows a bipolar resistance switching behaviour at low voltage, while the retention test and rewrite cycles of more than 300,000 indicate the enhancement of switching capability. The mechanism of resistance switching is further explained by the forming and rupture processes of the filament in the TiO2 layer with the help of more oxygen vacancies which are provided by the transparent ITO electrodes. 展开更多
关键词 colossal electroresistance effect electrical pulse induced resistance switching (EPIR) transparent resistance random access memory (TRRAM)
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Effects of Electrode on Resistance Switching Properties of ZnMn_2O_4 Films Deposited by Magnetron Sputtering 被引量:2
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作者 王华 li zhida +2 位作者 xu jiwen zhang yupei yang ling 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第6期1230-1234,共5页
ZnMn_2O_4 films for resistance random access memory(RRAM) were fabricated with different device structures by magnetron sputtering. The effects of electrode on I-V characteristics, resistance switching behavior, end... ZnMn_2O_4 films for resistance random access memory(RRAM) were fabricated with different device structures by magnetron sputtering. The effects of electrode on I-V characteristics, resistance switching behavior, endurance and retention characteristics of ZnMn_2O_4 films were investigated. The ZnMn_2O_4 films, using p-Si and Pt as bottom electrode, exhibit bipolar resistive switching(BRS) behavior dominated by the space-charge-limited conduction(SCLC) mechanism in the high resistance state(HRS) and the filament conduction mechanism in the low resistance state(LRS), but the ZnMn_2O_4 films using n-Si as bottom electrodes exhibit both bipolar and unipolar resistive switching behaviors controlled by the Poole-Frenkel(P-F) conduction mechanism in both HRS and LRS. Ag/ZnMn_2O_4/p-Si device possesses the best endurance and retention characteristics, in which the number of stable repetition switching cycle is over 1000 and the retention time is longer than 106 seconds. However, the highest RHRS/R_(LRS) ratio of 104 and the lowest V_(ON) and V_(OFF) of 3.0 V have been observed in Ag/ZnMn_2O_4/Pt device. Though the Ag/ZnMn_2O_4/n-Si device also possesses the highest RHRS/R_(LRS) ratio of 104, but the highest values of V_(ON),V_(OFF), RHRS and R_(LRS), as well as the poor endurance and retention characteristics. 展开更多
关键词 ZnMn2O4 resistance switching behavior electrode magnetron sputtering
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Resistance Switching Properties of Ag/Zn Mn_2O_4/p-Si Fabricated by Magnetron Sputtering for Resistance Random Access Memory 被引量:1
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作者 王华 LI Zhida +3 位作者 XU Jiwen ZHANG Yupei YANG Ling QIU Wei 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第6期1159-1162,共4页
A resistance random access memory(RRAM) with a structure of Ag/ZnMn2O4/p-Si was fabricated by magnetron sputtering method. Reliable and repeated switching of the resistance of ZnMn2O4 fi lms was obtained between two... A resistance random access memory(RRAM) with a structure of Ag/ZnMn2O4/p-Si was fabricated by magnetron sputtering method. Reliable and repeated switching of the resistance of ZnMn2O4 fi lms was obtained between two well-defi ned states of high and low resistance with a narrow dispersion and 3V switching voltages. Resistance ratio of the high resistance state and low resistance state was found in the range of around 10^3 orders of magnitude and up to about 10^3 test cycles. The retention time of Ag/ZnMn2O4/p-Si device is longer than 10^6 seconds and the resistance ratio between two states remains higher than 10^3 at room temperature, showing a remarkable reliability performance of the RRAM devices for nonvolatile memory application. The equivalent simulation circuits for HRS(high resistance state) and LRS(low resistance state) were also studied by impedance spectroscopy. 展开更多
关键词 ZnMn2O4 resistance switching properties RRAM magnetron sputtering
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Bipolar resistance switching in the fully transparent BaSnO_3-based memory device
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作者 张婷 殷江 +3 位作者 赵高峰 张伟风 夏奕东 刘治国 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第8期481-486,共6页
The fully transparent indium-tin-oxide/BaSnO3/F-doped SnO2 devices that show a stable bipolar resistance switching effect are successfully fabricated. In addition to the transmittance being above 87% for visible light... The fully transparent indium-tin-oxide/BaSnO3/F-doped SnO2 devices that show a stable bipolar resistance switching effect are successfully fabricated. In addition to the transmittance being above 87% for visible light, an initial forming process is unnecessary for the production of transparent memory. Fittings to the current-voltage curves reveal the interfacial conduction in the devices. The first-principles calculation indicates that the oxygen vacancies in cubic BaSnO3 will form the defective energy level below the bottom of conduction band. The field-induced resistance change can be explained based on the change of the interracial Schottky barrier, due to the migration of oxygen vacancies in the vicinity of the interface. This work presents a candidate material BaSnO3 for the application of resistive random access memory to transparent electronics. 展开更多
关键词 transparent resistive random access memory resistance switching oxygen vacancy BaSnO3
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Multi-polar resistance switching and memory effect in copper phthalocyanine junctions
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作者 乔士柱 康仕寿 +7 位作者 秦羽丰 李强 钟海 康韵 于淑云 韩广兵 颜世申 梅良模 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第5期623-629,共7页
Copper phthalocyanine junctions, fabricated by magnetron sputtering and evaporating methods, show multi-polar (unipolar and bipolar) resistance switching and the memory effect. The multi-polar resistance switching h... Copper phthalocyanine junctions, fabricated by magnetron sputtering and evaporating methods, show multi-polar (unipolar and bipolar) resistance switching and the memory effect. The multi-polar resistance switching has not been observed simultaneously in one organic material before. With both electrodes being cobalt, the unipolar resistance switching is universal. The high resistance state is switched to the low resistance state when the bias reaches the set voltage. Generally, the set voltage increases with the thickness of copper phthalocyanine and decreases with increasing dwell time of bias. Moreover, the low resistance state could be switched to the high resistance state by absorbing the phonon energy. The stability of the low resistance state could be tuned by different electrodes. In Au/copper phthalocyanine/Co system, the low resistance state is far more stable, and the bipolar resistance switching is found. Temperature dependence of electrical transport measurements demonstrates that there are no obvious differences in the electrical transport mechanism before and after the resistance switching. They fit quite well with Mott variable range hopping theory. The effect of A1203 on the resistance switching is excluded by control experiments. The holes trapping and detrapping in copper phthalocyanine layer are responsible for the resistance switching, and the interfacial effect between electrodes and copper phthalocyanine layer affects the memory effect. 展开更多
关键词 organic memory resistance switching copper phthalocyanine
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The influence of interfacial barrier engineering on the resistance switching of In_2O_3:SnO_2/TiO_2/In_2O_3:SnO_2 device
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作者 刘紫玉 张培健 +4 位作者 孟洋 李栋 孟庆宇 李建奇 赵宏武 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第4期473-477,共5页
The I-V characteristics of In2O3:SnO2/TiO2/In2O3:SnO2 junctions with different interracial barriers are inves- tigated by comparing experiments. A two-step resistance switching process is found for samples with two ... The I-V characteristics of In2O3:SnO2/TiO2/In2O3:SnO2 junctions with different interracial barriers are inves- tigated by comparing experiments. A two-step resistance switching process is found for samples with two interfacial barriers produced by specific thermal treatment on the interfaces. The nonsynchronous occurrence of conducting filament formation through the oxide bulk and the reduction in the interracial barrier due to the migration of oxygen vacancies under the electric field is supposed to explain the two-step resistive switching process. The unique switching properties of the device, based on interracial barrier engineering, could be exploited for novel applications in nonvolatile memory devices. 展开更多
关键词 resistance switching interfacial Schottky barrier oxygen vacancy two-step switching
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Resistance switching in oxides with inhomogeneous conductivity
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作者 尚大山 孙继荣 +1 位作者 沈保根 Wuttig Matthias 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第6期1-18,共18页
Electric-field-induced resistance switching (RS) phenomena have been studied for over 60 years in metal/dielectrics/metal structures. In these experiments a wide range of dielectrics have been studied including bina... Electric-field-induced resistance switching (RS) phenomena have been studied for over 60 years in metal/dielectrics/metal structures. In these experiments a wide range of dielectrics have been studied including binary transition metal oxides, perovskite oxides, chalcogenides, carbon- and silicon-based materials, as well as organic materials. RS phenomena can be used to store information and offer an attractive performance, which encompasses fast switching speeds, high scalability, and the desirable compatibility with Si-based complementary metal-oxide-semiconductor fabrication. This is promising for nonvolatile memory technology, i.e., resistance random access memory (RRAM). However, a comprehensive understanding of the underlying mechanism is still lacking. This impedes faster product development as well as accurate assessment of the device performance potential. Generally speaking, RS occurs not in the entire dielectric but only in a small, confined region, which results from the local variation of conductivity in dielectrics. In this review, we focus on the RS in oxides with such an inhomogeneous conductivity. According to the origin of the conductivity inhomogeneity, the RS phenomena and their working mechanism are reviewed by dividing them into two aspects: interface RS, based on the change of contact resistance at metal/oxide interface due to the change of Schottky barrier and interface chemical layer, and bulk RS, realized by the formation, connection, and disconnection of conductive channels in the oxides. Finally the current challenges of RS investigation and the potential improvement of the RS performance for the nonvolatile memories are discussed. 展开更多
关键词 resistance switching inhomogeneous conductivity transition metal oxide
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Homogeneous interface-type resistance switching in Au/La_(0.67)Ca_(0.33)MnO_3/SrTiO_3/F:SnO_2 heterojunction memories
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作者 张婷 丁玲红 张伟风 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第4期467-472,共6页
La0.67Ca0.33MnO3 thin films are fabricated on fluorine-doped tin oxide conducting glass substrates by a pulsed laser deposition technique with SrTiO3 used as a buffer layer. The current-voltage characteristics of the ... La0.67Ca0.33MnO3 thin films are fabricated on fluorine-doped tin oxide conducting glass substrates by a pulsed laser deposition technique with SrTiO3 used as a buffer layer. The current-voltage characteristics of the heterojunetions exhibit an asymmetric and resistance switching behaviour. A homogeneous interface-type conduction mechanism is also reported using impedance spectroscopy. The spatial homogeneity of the charge carrier distribution leads to field- induced potential-barrier change at the Au-La0.67Ca0.33MnO3 interface and a concomitant resistance switching effect. The ratio of the high resistance state to the low resistance state is found to be as high as 1.3 x 10^4% by simulating the AC electric field. This colossal resistance switching effect will greatly improve the signal-to-noise ratio in nonvolatile memory applications. 展开更多
关键词 La0.67Ca0.33MnO3 thin films resistance switching impedance spectroscopy metal-oxide interface
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Electric-field control of perpendicular magnetic anisotropy by resistive switching via electrochemical metallization
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作者 袁源 魏陆军 +7 位作者 卢羽 刘若柏 刘天宇 陈家瑞 游彪 张维 吴镝 杜军 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第6期595-601,共7页
Electric-field control of perpendicular magnetic anisotropy(PMA) is a feasible way to manipulate perpendicular magnetization,which is of great importance for realizing energy-efficient spintronics.Here,we propose a no... Electric-field control of perpendicular magnetic anisotropy(PMA) is a feasible way to manipulate perpendicular magnetization,which is of great importance for realizing energy-efficient spintronics.Here,we propose a novel approach to accomplish this task at room temperature by resistive switching(RS) via electrochemical metallization(ECM) in a device with the stack of Si/SiO_(2)/Ta/Pt/Ag/Mn-doped ZnO(MZO)/Pt/Co/Pt/ITO.By applying certain voltages,the device could be set at high-resistance-state(HRS) and low-resistance-state(LRS),accompanied with a larger and a smaller coercivity(H_(C)),respectively,which demonstrates a nonvolatile E-field control of PMA.Based on our previous studies and the present control experiments,the electric modulation of PMA can be briefly explained as follows.At LRS,the Ag conductive filaments form and pass through the entire MZO layer and finally reach the Pt/Co/Pt sandwich,leading to weakening of PMA and reduction of H_(C).In contrast,at HRS,most of the Ag filaments dissolve and leave away from the Pt/Co/Pt sandwich,causing partial recovery of PMA and an increase of H_(C).This work provides a new clue to designing low-power spintronic devices based on PMA films. 展开更多
关键词 electric-field control resistive switching perpendicular magnetic anisotropy electrochemical metallization magnetoelectric random access memory
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Resistive switching properties of SnO_(2)nanowires fabricated by chemical vapor deposition
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作者 陈亚琦 唐政华 +1 位作者 蒋纯志 徐徳高 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第9期443-448,共6页
Resistive switching(RS)devices have great application prospects in the emerging memory field and neuromorphic field,but their stability and unclear RS mechanism limit their relevant applications.In this work,we constr... Resistive switching(RS)devices have great application prospects in the emerging memory field and neuromorphic field,but their stability and unclear RS mechanism limit their relevant applications.In this work,we construct a hydrogenated Au/SnO_(2)nanowire(NW)/Au device with two back-to-back Schottky diodes and investigate the RS characteristics in air and vacuum.We find that the Ion/Io ff ratio increases from 20 to 10^(4)when the read voltage decreases from 3.1 V to^(-1)V under the condition of electric field.Moreover,the rectification ratio can reach as high as 10^4owing to oxygen ion migration modulated by the electric field.The nanodevice also shows non-volatile resistive memory characteristic.The RS mechanism is clarified based on the changes of the Schottky barrier width and height at the interface of Au/SnO_(2)NW/Au device.Our results provide a strategy for designing high-performance memristive devices based on SnO_(2)NWs. 展开更多
关键词 Au/SnO_(2)NW/Au device resistive switching characteristics resistive switching mechanism
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Electrochemical anodic oxidation assisted fabrication of memristors 被引量:1
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作者 Shuai-Bin Hua Tian Jin Xin Guo 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2024年第3期250-272,共23页
Owing to the advantages of simple structure,low power consumption and high-density integration,memristors or memristive devices are attracting increasing attention in the fields such as next generation non-volatile me... Owing to the advantages of simple structure,low power consumption and high-density integration,memristors or memristive devices are attracting increasing attention in the fields such as next generation non-volatile memories,neuromorphic computation and data encryption.However,the deposition of memristive films often requires expensive equipment,strict vacuum conditions,high energy consumption,and extended processing times.In contrast,electrochemical anodizing can produce metal oxide films quickly(e.g.10 s) under ambient conditions.By means of the anodizing technique,oxide films,oxide nanotubes,nanowires and nanodots can be fabricated to prepare memristors.Oxide film thickness,nanostructures,defect concentrations,etc,can be varied to regulate device performances by adjusting oxidation parameters such as voltage,current and time.Thus memristors fabricated by the anodic oxidation technique can achieve high device consistency,low variation,and ultrahigh yield rate.This article provides a comprehensive review of the research progress in the field of anodic oxidation assisted fabrication of memristors.Firstly,the principle of anodic oxidation is introduced;then,different types of memristors produced by anodic oxidation and their applications are presented;finally,features and challenges of anodic oxidation for memristor production are elaborated. 展开更多
关键词 anodic oxidation anodized aluminium oxide MEMRISTOR resistive switching electrical properties
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Application of artificial synapse based on all-inorganic perovskite memristor in neuromorphic computing
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作者 Fang Luo Wen-Min Zhong +3 位作者 Xin-Gui Tang Jia-Ying Chen Yan-Ping Jiang Qiu-Xiang Liu 《Nano Materials Science》 EI CAS CSCD 2024年第1期68-76,共9页
Artificial synapse inspired by the biological brain has great potential in the field of neuromorphic computing and artificial intelligence.The memristor is an ideal artificial synaptic device with fast operation and g... Artificial synapse inspired by the biological brain has great potential in the field of neuromorphic computing and artificial intelligence.The memristor is an ideal artificial synaptic device with fast operation and good tolerance.Here,we have prepared a memristor device with Au/CsPbBr_(3)/ITO structure.The memristor device exhibits resistance switching behavior,the high and low resistance states no obvious decline after 400 switching times.The memristor device is stimulated by voltage pulses to simulate biological synaptic plasticity,such as long-term potentiation,long-term depression,pair-pulse facilitation,short-term depression,and short-term potentiation.The transformation from short-term memory to long-term memory is achieved by changing the stimulation frequency.In addition,a convolutional neural network was constructed to train/recognize MNIST handwritten data sets;a distinguished recognition accuracy of~96.7%on the digital image was obtained in 100 epochs,which is more accurate than other memristor-based neural networks.These results show that the memristor device based on CsPbBr3 has immense potential in the neuromorphic computing system. 展开更多
关键词 MEMRISTOR CsPbBr_(3) Resistive switching Artificial synapse Neuromorphic computing
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Influence of Poly(methyl metacrylate) Addition on Resistive Switching Performance of P3HT/P(VDF-TrFE) Blend Films
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作者 翁军辉 胡静航 +2 位作者 张剑驰 蒋玉龙 朱国栋 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第2期200-206,I0002,共8页
Organic semiconducting/ferroelectric blend films attracted much attention due to their electrical bistability and rectification properties and thereof the potential in resistive memory devices. Blend films were usuall... Organic semiconducting/ferroelectric blend films attracted much attention due to their electrical bistability and rectification properties and thereof the potential in resistive memory devices. Blend films were usually deposited from solution, during which phase separation oc- curred, resulting in discrete semiconducting phase whose electrical property was modulated by surrounding ferroelectric phase. However, phase separation resulted in rough surface and thus large leakage current. To further improve electrical properties of such blend films, poly(methyl metacrylate) (PMMA) was introduced as additive into P3HT/P(VDF-TrFE) semiconducting/ferroelectric blend films in this work. It indicated that small amount of PMMA addition could effectively enhance the electrical stability to both large electrical stress and electrical fatigue and further improve retention performance. Overmuch PMMA addition tended to result in the loss of resistive switching property. A model on the configuration of three components was also put forward to well understand our experimental observations. 展开更多
关键词 Resistive switching Ferroelectric/semiconducting blend film Spin coating Phase separation
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Resistive Switching Memory of TiO2 Nanowire Networks Grown on Ti Foil by a Single Hydrothermal Method 被引量:4
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作者 Ming Xiao Kevin P.Musselman +1 位作者 Walter W.Duley Norman Y.Zhou 《Nano-Micro Letters》 SCIE EI CAS 2017年第2期23-31,共9页
The resistive switching characteristics of TiO_2 nanowire networks directly grown on Ti foil by a single-step hydrothermal technique are discussed in this paper. The Ti foil serves as the supply of Ti atoms for growth... The resistive switching characteristics of TiO_2 nanowire networks directly grown on Ti foil by a single-step hydrothermal technique are discussed in this paper. The Ti foil serves as the supply of Ti atoms for growth of the TiO_2 nanowires, making the preparation straightforward. It also acts as a bottom electrode for the device. A top Al electrode was fabricated by e-beam evaporation process. The Al/TiO_2 nanowire networks/Ti device fabricated in this way displayed a highly repeatable and electroforming-free bipolar resistive behavior with retention for more than 10~4 s and an OFF/ON ratio of approximately 70. The switching mechanism of this Al/TiO_2 nanowire networks/Ti device is suggested to arise from the migration of oxygen vacancies under applied electric field. This provides a facile way to obtain metal oxide nanowire-based Re RAM device in the future. 展开更多
关键词 TiO2 nanowire networks Resistive switching memory Ti foil Hydrothermal process Al electrode
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Modeling of conducting bridge evolution in bipolar vanadium oxide-based resistive switching memory 被引量:2
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作者 张楷亮 刘凯 +3 位作者 王芳 尹富红 韦晓莹 赵金石 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第9期554-558,共5页
We investigate the resistive switching characteristics of a Cu/VOx/W structure. The VOx film is deposited by radio- frequency magnetron sputtering on the Cu electrode as a dielectric layer. The prepared VOx sample str... We investigate the resistive switching characteristics of a Cu/VOx/W structure. The VOx film is deposited by radio- frequency magnetron sputtering on the Cu electrode as a dielectric layer. The prepared VOx sample structure shows reproducible bipolar resistive switching characteristics with ultra-low switching voltage and good cycling endurance. A modified physical model is proposed to elucidate the typical switching behavior of the vanadium oxide-based resistive switching memory with a sudden resistance transition, and the self-saturation of reset current as a function of compliance current is observed in the test, which is attributed to the conducting mechanism is discussed in detail. growth pattern of the conducting filaments. Additionally, the related 展开更多
关键词 resistive switching vanadium oxide conducting filament magnetron sputtering
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Observation of Resistive Switching Memory by Reducing Device Size in a New Cr/CrO_x/TiO_x/TiN Structure 被引量:2
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作者 Debanjan Jana Subhranu Samanta +2 位作者 Sourav Roy Yu Feng Lin Siddheswar Maikap 《Nano-Micro Letters》 SCIE EI CAS 2015年第4期392-399,共8页
The resistive switching memory characteristics of 100 randomly measured devices were observed by reducing device size in a Cr/Cr Ox/Ti Ox/Ti N structure for the first time.Transmission electron microscope image confir... The resistive switching memory characteristics of 100 randomly measured devices were observed by reducing device size in a Cr/Cr Ox/Ti Ox/Ti N structure for the first time.Transmission electron microscope image confirmed a viahole size of 0.4 lm.A 3-nm-thick amorphous Ti Oxwith 4-nm-thick polycrystalline Cr Oxlayer was observed.A small 0.4-lm device shows reversible resistive switching at a current compliance of 300 l A as compared to other larger size devices(1–8 lm)owing to reduction of leakage current through the Ti Oxlayer.Good device-to-device uniformity with a yield of[85%has been clarified by weibull distribution owing to higher slope/shape factor.The switching mechanism is based on oxygen vacancy migration from the Cr Oxlayer and filament formation/rupture in the Ti Oxlayer.Long read pulse endurance of[105cycles,good data retention of 6 h,and a program/erase speed of 1 ls pulse width have been obtained. 展开更多
关键词 CrOx TiOx Resistive switching memory Slope/shape factor Device size
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Coexistence of unipolar and bipolar modes in Ag/ZnO/Pt resistive switching memory with oxygen-vacancy and metal-Ag filaments 被引量:1
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作者 马寒露 王中强 +5 位作者 徐海阳 张磊 赵晓宁 韩曼舒 马剑钢 刘益春 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第12期418-423,共6页
In this study, the unipolar resistive switching (URS) and bipolar resistive switching (BRS) are demonstrated to be coexistent in the Ag/ZnO/Pt memory device, and both modes are observed to strongly depend on the p... In this study, the unipolar resistive switching (URS) and bipolar resistive switching (BRS) are demonstrated to be coexistent in the Ag/ZnO/Pt memory device, and both modes are observed to strongly depend on the polarity of forming voltage. The mechanisms of the URS and BRS behaviors could be attributed to the electric-field-induced migration of oxygen vacancies (Vo) and metal-Ag conducting filaments (CFs) respectively, which are confirmed by investigating the temperature dependences of low resistance states in both modes. Furthermore, we compare the resistive switching (RS) characteristics (e.g., forming and switching voltages, reset current and resistance states) between these two modes based on Vo- and Ag-CFs. The BRS mode shows better switching uniformity and lower power than the URS mode. Both of these modes exhibit good RS performances, including good retention, reliable cycling and high-speed switching. The result indicates that the coexistence of URS and BRS behaviors in a single device has great potential applications in future nonvolatile multi-level memory. 展开更多
关键词 resistive switching UNIPOLAR BIPOLAR oxygen vacancy METAL conductive filament
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Resistive switching characteristics of Ti/ZrO_2/Pt RRAM device 被引量:2
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作者 雷晓艺 刘红侠 +5 位作者 高海霞 杨哈妮 王国明 龙世兵 马晓华 刘明 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第11期507-511,共5页
In this paper, the bipolar resistive switching characteristic is reported in Ti/ZrO2/Pt resistive switching memory de- vices. The dominant mechanism of resistive switching is the formation and rupture of the conductiv... In this paper, the bipolar resistive switching characteristic is reported in Ti/ZrO2/Pt resistive switching memory de- vices. The dominant mechanism of resistive switching is the formation and rupture of the conductive filament composed of oxygen vacancies. The conduction mechanisms for low and high resistance states are dominated by the ohmic conduc- tion and the trap-controlled space charge limited current (SCLC) mechanism, respectively. The effect of a set compliance current on the switching parameters is also studied: the low resistance and reset current are linearly dependent on the set compliance current in the log-log scale coordinate; and the set and reset voltage increase slightly with the increase of the set compliance current. A series circuit model is proposed to explain the effect of the set compliance current on the resistive switching behaviors. 展开更多
关键词 resistive random access memory (RRAM) resistive switching (RS) conductive filament (CF) compliance current
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A Cu/ZnO Nanowire/Cu Resistive Switching Device 被引量:1
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作者 Lijie Li Yan Zhang Zhengjun Chew 《Nano-Micro Letters》 SCIE EI CAS 2013年第3期159-162,共4页
A new device has been realized using flip-chip joining two printed circuit boards(PCBs) on which zinc oxide(ZnO) nanowires were synthesized. Energy dispersive X-ray measurement has been conducted for the ZnO nanowires... A new device has been realized using flip-chip joining two printed circuit boards(PCBs) on which zinc oxide(ZnO) nanowires were synthesized. Energy dispersive X-ray measurement has been conducted for the ZnO nanowires, confirming that Cu elements have been diffused into the nanowires during the chemical growth process. From I-V measurements, this Cu/ZnO nanowire/Cu structure exhibits a resistive tuning behaviour, which varies greatly with the frequency of the applied sinusoidal source. 展开更多
关键词 Cu/ZnO NANOWIRES FLIP-CHIP Resistive switching DEVICE
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