Figure 2From: Forming-free bipolar resistive switching in nonstoichiometric ceria filmsXPS binding energy profiles. (a) Depth profiles of Zr, Ce, O, Pt, and W for the W/Zr/CeO x /Pt structure, (b) Ce 3d, (c) Zr 3d, and (d) O 1 s in the Zr/CeO x /Pt device.Back to article page