Characteristics of the magnetic microstructure of amorphous and nanocrystalline ferromagnets with a random anisotropy: Theoretical estimates and experiment

An experimental determination (both direct and indirect) of the characteris tics of the magnetic microstructure, namely, the ferromagnetic correlation radius R-f and the rms fluctuation of the mean anisotropy D-1/2<H-a>, is pe rformed for amorphous and nanocrystalline ferromagnets with a random anisot ropy characterized by the quantities R-c and (DHa)-H-1/2, respectively. The magnetization curves of amorphous and nanocrystalline ferromagnets are fou nd to exhibit a dependence on H that is caused by the alignment of the magn etizations of individual magnetic blocks with the field. (C) 2000 MAIK "Nau ka/Interperiodica".