Bipolar resistive switching in Ba$_{0.5}$S$_{r0.5}$Co$_{0.2}$Fe$_{0.8}$O$_{3}$ thin films

Five-component perovskite Ba0.5Sr0.5Co0.2Fe0.8O3 (BSCFO) thin films are reported to have polarized electrical-pulse-induced resistance (EPIR) change at room temperature. Such an EPIR change is attributed to a combined effect of the resistance change of the Schottky barrier and the oxygen ion/vacancy movement near the interface. In the BSCFO, the lower threshold voltage of the electric pulse that leads to nonvolatile resistive changes is close related to its higher oxygen permeability.