Resistance-switching properties of La0.67Ca0.33MnO3 thin films with Ag-Al alloy top electrodes

Abstract

A novel Ag-Al alloy electrode has been prepared on the La 0.67Ca0.33MnO3 (LCMO) film grown by pulsed laser deposition, with the aim to improve its resistance-switching properties. Nonlinear, asymmetric, and hysteretic current-voltage characteristics and reversible polarity-dependent switching properties are achieved in the Ag-Al alloy/LCMO/Pt structure. Detailed current-voltage characteristics analysis indicates that the resistance-switching behavior can be well explained by the mechanism of trap-controlled space charge limited conduction at the Ag-Al alloy/LCMO interface. The LCMO film with an Ag-Al alloy top electrode exhibits much better resistance-switching properties than that with an Al top electrode, including the shorter switching time and more stable switching process, demonstrating that the Ag-Al alloy electrode is a promising electrode materials of manganite films for resistance random access memory applications. Show more