Field-ion microscopic observations showed that Pd atoms diffused on (001) via site-to-site hopping. On the basis of measurements performed at 265K, the activation energy for the surface diffusion of Pd was estimated to be equal to 0.70eV.

G.L.Kellogg, A.F.Wright, M.S.Daw: Journal of Vacuum Science and Technology A, 1991, 9[3], 1757-60