Experimental evidence of effective <111> atomic exchanges in a B2   intermetallic alloy
  We report on an atomic-scale X-ray Photon Correlation Spectroscopy study on Fe-rich FeAl in the B2-ordered regime revealing effective <111>-exchanges of atoms on the Al-sublattice. The diffusion mechanism responsible for these exchanges is the dominating process for chemical diffusion and therefore controls long-range material transport in the system. Comparison with previous atomistic results shows that the dominance of further exchanges can be characteristic at moderate temperatures where the system is highly ordered. 
Markus Stana, Manuel Ross and Bogdan Sepiol
cond-mat.mtrl-sci