Transition metals in amorphous samples exhibited a direct interstitial diffusion behavior which was retarded by temporary trapping at defects that were intrinsic to the amorphous structure. Diffusion was investigated here by means of Rutherford back-scattering spectrometry. It was found that the data (table 92) could be fitted by using foreign-atom interstitial diffusion coefficients for crystalline Si; modified by the presence of traps in concentrations of between 0.2 and 1at%, and with trapping enthalpies of about 0.9eV.

S.Coffa, J.M.Poate, D.C.Jacobson, W.Frank, W.Gustin: Physical Review B, 1992, 45[15], 8355-8

Table 92

Diffusivity of Pd in Amorphous Si