This two videos briefly show the processing steps of fabrication of IGZO-based memristor devices. The electrode contacts are Mo.

To know more about the device characteristics, you may read the article entitled: "Noble-Metal-Free Memristive Devices Based on IGZO for Neuromorphic Applications"

Here is the link to the article:
https://onlinelibrary.wiley.com/doi/abs/10.1002/aelm.202000242