By comparing Fiske step voltage, the Al peak in AVS and distortion I-V characteristic it is confirmed that the proximity effect by normal Al between the AlOx and Nb is existent. The result was compared with the McMillan theory.

• 由Fiske台阶电压，AVS中的Al峰和I－V特性的畸变，证实了结中Al/Nb间由常态Al而引起的亲近效应的存在，并用McMillan理论作了讨论。