Confining vertical conducting filament for reliable resistive switching by using a Au-probe tip as the top electrode for epitaxial brownmillerite oxide memristive device.

ABSTRACT: We had discovered novel resistance switching phenomena in SrCoO_x epitaxial thin films. We have interpreted the results in terms of the topotactic phase transformation between their insulating brownmillerite phase and the conducting perovskite phase and the existence of a rather vertical conducting filament due to its inherent layered structure. However, the rough interface observed between the SrCoO_x and the Au top electrode (area ~10000 μm²) was assumed to result in the observed fluctuation in key switching parameters. In order to verify the effect of rough interface on the switching performance in the SrCoO_x device, in this work, we studied the resistive switching properties of a SrCoO_x device by placing a Au-coated tip (end area ~0.

SUBMITTER: Nallagatla VR 

PROVIDER: S-EPMC6362224 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature