物理学报Issue(20)：426-431,6.DOI:10.7498/aps.62.207302
La0.5Ca0.5MnO3内禀与界面电脉冲诱导电阻转变效应的比较
Comparison bwtween intrinsic and interfacial electrical pulse induced resistance effects in La0.5Ca0.5MnO3 ceramics
摘要
Abstract
In general, the electrical pulse induced resistance (EPIR) effect of perovskite manganite originates from the interfacial Schottky barrier between the metal electrode and the surface of sample. In this work, La0.5Ca0.5MnO3 (LCMO) ceramic samples are synthe-sized by solid state reaction and the transport properties, especially the EPIR effect are investigated using 4-wire measurement mode. Although the I-V curve of LCMO shows ohmic linearity under the 4-wire measurement mode at room temperature, a stable and re-markable EPIR effect can still be observed when the pulse voltage is more than the critical value. Through the comparison between the intrinsic EPIR under 4-wire mode and the interface one under 2-wire mode, we find that the intrinsic EPIR of LCMO has a smaller critical pulse voltage to induce the effect, but it has a better anti-fatigue property. The intrinsic EPIR effect is a novel one which is observed in rare earth doped manganites.关键词
钙钛矿结构锰氧化物/电致电阻效应/电脉冲诱导电阻转变效应/肖特基势垒Key words
perovskite manganite/colossal electroresistance effect/interfacial electrical pulse induced resistance switching effect/Schottky barrier引用本文复制引用
吴美玲,石大为,阚芝兰,王瑞龙,丁益民,肖海波,杨昌平..La0.5Ca0.5MnO3内禀与界面电脉冲诱导电阻转变效应的比较[J].物理学报,2013,(20):426-431,6.基金项目
国家自然科学基金(批准号:11074067,11174073)和湖北省高等学校优秀中青年科技创新团队计划(批准号:T201301)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant Nos.11074067,11174073) and the Project of Science and Technology Innovation Team of Hubei Province, China (Grant No. T201301) （批准号:11074067,11174073）
