Measurements were made of the temperature and pressure dependences of the diffusion of Ni (a probe for Co) in relaxed and non-relaxed amorphous alloys. This was done by means of tracer techniques and secondary-ion mass spectroscopy. In the case of the relaxed state, the results could be described by:

D (m2/s) = 2.4 x 10-6 exp[-1.65(eV)/kT]

The pressure dependence yielded an activation volume which was equal to 66% of the average atomic volume of the alloy.

P.Klugkist, K.Rätzke, F.Faupel, P.Troche, P.Fielitz, V.Naundorf: Philosophical Magazine Letters, 1999, 79[10], 827-36