NMR diffusion measurements were made of pure aluminum foil at constant vacancy concentration by rapid rf heating from a constant preparation temperature. Thus the temperature dependence of the diffusion yielded the migration energy. The results of 0.71 and 0.66eV were in good agreement with the accepted value.

Separate Migration and Formation Energies of Vacancies in Aluminum Measured by NMR. T.W.Gullion, M.S.Conradi: Physical Review B, 1987, 36[7], 3880-3