Direct Observation of Localized Radial Oxygen Migration in Functioning Tantalum Oxide Memristors. Academic Article uri icon


  • Oxygen migration in tantalum oxide, a promising next-generation storage material, is studied using in operando X-ray absorption spectromicroscopy. This approach allows a physical description of the evolution of conduction channel and eventual device failure. The observed ring-like patterns of oxygen concentration are modeled using thermophoretic forces and Fick diffusion, establishing the critical role of temperature-driven oxygen migration.

published proceedings

  • Adv Mater

altmetric score

  • 47.948

author list (cited authors)

  • Kumar, S., Graves, C. E., Strachan, J. P., Grafals, E. M., Kilcoyne, A., Tyliszczak, T., ... Williams, R. S.

citation count

  • 86

complete list of authors

  • Kumar, Suhas||Graves, Catherine E||Strachan, John Paul||Grafals, Emmanuelle Merced||Kilcoyne, Arthur L David||Tyliszczak, Tolek||Weker, Johanna Nelson||Nishi, Yoshio||Williams, R Stanley

publication date

  • April 2016