Atomic transport in the radiation-enhanced diffusion region was monitored via shifts in a marker layer in ion-mixed bi-layers. Bombardment with 80keV Ar+ ions, to a dose of 1.5 x 1016/cm2, was carried out at temperatures ranging from 90 to 700K. In the case of Pd/Co, the atomic flux of Pd which was transported across the interface was nearly the same as the Co flux in the thermal spike region. The Pd flux was always larger than the Co flux in the radiation-enhanced diffusion region. However, in the Pd/Au system, the Pd flux was almost the same as that of Au. A model was proposed for the description of atomic transport in the radiation-enhanced diffusion region. This predicted that an atom with a small cohesive energy had a greater mobility than one with a large cohesive energy.

G.S.Chang, S.M.Jung, J.H.Song, H.B.Kim, J.J.Woo, D.H.Byun, C.N.Whang: Nuclear Instruments and Methods in Physics Research B, 1997, 121[1-4], 244-50