“…For example at 800 K, m ′ 6.5 in Fe-Cr, m ′ 4.5 in Cu-Co systems (see also some other examples and interesting phenomena related to the large asymmetry in Ref. 19,20,21,22,23,24). Note, that according to the Arrhenius-type temperature dependence of the diffusion coefficient, m ′ increases with decreasing temperature due to the different activation energies in A and B.…”