Magnetic investigations on the disordering of a ball milled Fe-40Al at% alloy

The disordering process of a B2 Fe-40 Al at % ahoy induced by ball milling has been studied from magnetic and structural points of view. The ball mill ing process involves several steps: loss of long-range order, reduced cryst allite size, induced microstrains, loss of short-range order and lattice ex pansion. These structural changes induce an irreversible transition from a paramagnetic to a ferromagnetic state, which can be observed in the differe nt magnetic parameters studied. (C) 1999 Elsevier Science B.V. All rights r eserved.