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On the mass dependence of the energy factor ΔK of the isotope effect for impurity diffusion in copper
Author(s) -
Eckseler H.,
Herzig Ch.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220850120
Subject(s) - impurity , diffusion , copper , kinetic energy , vacancy defect , kinetic isotope effect , chemistry , activation energy , frequency factor , isotope , jump , analytical chemistry (journal) , atomic physics , thermodynamics , crystallography , physics , nuclear physics , organic chemistry , quantum mechanics , chromatography , deuterium
Using diffusion and isotope effect measurements of Au and Co in Cu a lower limit of the correlation factor of impurity diffusion as well as the corresponding limits of the kinetic energy factor Δ K are calculated from Manning's jump frequency model of vacancies near impurity atoms. The results show that a variation in impurity mass by a factor of three does not change Δ K for impurity diffusion significantly. For Au and Co in Cu Δ K is found to be about the same as for self‐diffusion in copper. This result allows to estimate the jump frequency ratios and the corresponding vacancy flow factors.