Ti/Pr_（0.7）Ca_（0.3）MnO_3/La_（0.67）Sr_（0.33）MnO_3/Pt异质结电致电阻效应的改善

摘要

Ti/Pr0.7Ca0.3MnO3/Pt and Ti/Pr0.7Ca0.3MnO3/La0.67Sr0.33MnO3/Pt heterostructures are prepared using a pulsed laser deposition （PLD） technique,and the resistive switching of the heterostructures is investigated.The Ti/Pr0.7Ca0.3MnO3/La0.67Sr0.33MnO3/Pt heterostructure,which has a La0.67Sr0.33MnO3 modulation layer,shows superior characteristics of resistive switching.In particular,the switching ratio and the fatigue properties are improved greatly in this heterostructure.The mechanism of resistive switching in Ti/Pr0.7Ca0.3MnO3/La0.67Sr0.33MnO3/Pt heterostructure is also discussed in this paper.%采用脉冲激光沉积技术制备了Ti/Pr0.7Ca0.3MnO3/Pt和Ti/Pr0.7Ca0.3MnO3/La0.67Sr0.33MnO3/Pt异质结并研究了La0.67Sr0.33MnO3功能插层对异质结电致电阻特性的影响.实验结果表明La0.67Sr0.33MnO3功能层的引入有效提高了器件的电阻转变特性,尤其是电阻转变率和疲劳性得到了极大的改善.对La0.67Sr0.33MnO3插层改善电致电阻转变特性的机理进行了定性的分析.