Atomic migration energies of 0.91eV, 0.66eV and 0.74eV were deduced in FePd from the phonon density of state in the L10 phase at 300 and 860K, and in the face-centered cubic phase at 1020K, respectively. A good agreement was observed with the resistivity measurement results. Effective pair interactions were determined using both an inverse cluster variation and an inverse Monte Carlo method. The results of the two methods agree well and lead to the predominance of the second effective pair interaction V2. The relevance of the deduced pair interactions was tested in terms of order–order and order–disorder kinetics simulations using a Monte Carlo model.

Atomic Migration and Ordering Energies in FePd - Measurement and Modeling. T.Mehaddene, O.Adjaoud, R.Kozubski, K.Tanaka, H.Numakura, J.M.Sanchez, C.Issro, W.Pfeiler, V.Pierron-Bohnes: Scripta Materialia, 2005, 53[4], 435-40