中文摘要：

采用固相烧结法制备La0.5Ca0.5MnO3（LCMO）陶瓷样品。以银胶做电极，用两线法对样品电输运性质，特别是对脉冲诱导电阻转变（electrical pulse induced resistance switching，EPIR）效应和忆阻器行为进行了研究。结果表明：室温下LCMO陶瓷表面与电极接触处存在明显的EPIR效应，高、低阻态的电阻值可长时间保持不变，具有良好的抗疲劳性质。样品电阻值与刺激脉冲的极性和幅度有关，当脉冲为正、幅值大于1.2V、宽度为0.01s时，样品出现EPIR效应，且处于稳定的高阻态。当脉冲极性反向时，样品处于稳定的低阻态，高低阻态可通过脉冲极性进行切换。当样品置于高阻态，随温度降低，其阻态仍能保持稳定，但高、低阻态差值明显。随温度升高，其阻值保持力下降，高、低阻态在高温区（〉600K1趋于重合。LCMO样品与电极接触处出现EPIR效应主要源于样品表面处的深能级陷阱。

英文摘要：

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 correlated to the polarity and amplitude of pulse. The EPIR occurs at pulse 〉 1.2V 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 decreases 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.