Nonvolatile resistive switching in Pr0.7Ca0.3MnO3 devices using multilayer graphene electrodes

Abstract

We report resistive switching in Pr0.7Ca0.3MnO3 (PCMO) devices using multilayer graphene (MLG) for nonvolatile memory applications. When MLG was used as a conducting electrode, PCMO device exhibited resistive switching with an on/off ratio of over two orders of magnitude and stable retention characteristics for over 104 s at 85 °C. Raman spectroscopy in both resistance states revealed increases in D and D′ peaks associated with defects and large shift in G peak position for high-resistance state. This was attributed to formation and dissolution of oxygenated graphene at the MLG/PCMO interface, resulting in resistive switching.