Effect of oxygen on the diffusion of Ni in Pt in Pt‐Ni‐Pt films

摘要

We have studied the effect of oxygen on the diffusion of Ni into Pt in the Pt‐Ni‐Pt films. Below 400 °C, the diffusion rates of Ni into both Pt layers are greatly reduced by oxygen. Above 500 °C, however, Ni rapidly mixes with Pt layers, which leads to the formation of Ni oxide on the Pt surface in the presence of oxygen.