Abstract
The current state-of-the-art in the research area of magnetic disaccommodation in rapidly solidified ferromagnetic alloys is reviewed. In these materials, the reversible relaxation of the initial magnetic permeability after a rearrangement of the magnetic domain structure is related to the presence of structural defects interacting with the local magnetization vector through a coupling which includes a significant magneto-elastic contribution. The nature of these defects, their interaction energy with magnetization and their degree of correlation are discussed in detail. Amorphous ferromagnetic alloys are characterized by a fast permeability relaxation of dissipative type, related to domain wall instabilities, which is superposed to the conventional magnetic aftereffect of diffusive type. Disaccommodation measurements are now routinely exploited in the analysis of the effect of an applied stress on complex magnetic domain structures of typical amorphous materials.
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