Impedance Spectroscopy of CaCu3Ti4O12 Films Showing Resistive Switching

Abstract

CaCu3Ti4O12 (CCTO), for resistance random access memory (RRAM) application, was prepared by the sol-gel method. Our preliminary study indicates that CCTO possesses the resistive switching behaviors of RRAM. In this work, the resistance switching characteristics of CCTO films were investigated. The impedance spectroscopy was applied to CCTO films during the switching cycle. Based on the results observed by impedance spectroscopy, the conduction mechanisms of the CCTO RRAMs at the original, ON, and OFF states were explored.