硅酸盐学报Issue(12)：1627-1631,5.DOI:10.7521/j.issn.0454-5648.2013.12.05
La0.5Ca0.5MnO3陶瓷的EPIR效应与深能级陷阱态的关系
Relations Between Deep Traps and EPIR Effect in La0.5Ca0.5MnO3 Ceramic
摘要
Abstract
La0.5Ca0.5MnO3 (LCMO) ceramic samples were synthesized by a solid-state sintering method. The transport properties, especially the electrical pulse induced resistance switching (EPIR) effect and its accompanying memristor behavior, were investigated using 2-wire measurement mode with silver-glue electrode. The EPIR effect was observed at room temperature for the samples, which have superior anti-fatigue properties at the high and low resistance states and maintain for a long time. The value of resistance (R) is cor-related to the polarity and amplitude of pulse. The EPIR occurs at pulse>1.2 V in a width of 0.01 s. The EPIR is in a high resistance state when the pulse is positive, while the EPIR is in a lower resistance state when the pulse is reversed, and the higher and lower resistance states can be switched by changing the polarity of pulse. The R-T measurement shows that the resistance state can be maintained when the temperature decreases to below room temperature. However, the gap between the higher and lower resistance states de-creases with increasing temperature, and the both states are expected to overlap at>600 K. The deep level traps on the surface are the main cause for the EPIR effect, which occurs at the interface between the electrode and the surface of LCMO sample.关键词
钙钛矿结构锰氧化物/脉冲诱导电阻转变效应/Schottky势垒/深能级陷阱/空间电荷层Key words
perovskite manganite/electrical pulse induced resistance switching effect/Schottky barrier/deep level traps/space charge layer分类
物理学引用本文复制引用
吴美玲,杨昌平,石大为,王瑞龙,肖海波,杨辅军,王浩,Vyacheslav Marchenkov..La0.5Ca0.5MnO3陶瓷的EPIR效应与深能级陷阱态的关系[J].硅酸盐学报,2013,(12):1627-1631,5.基金项目
国家自然科学基金(11074067，11174073)；湖北省高等学校优秀中青年科技创新团队计划(T201301)资助项目。 （11074067，11174073）
