Barkhausen noise studies in amorphous materials at vanishing anisotropies

In this work, Barkhausen noise measurements are shown for the amorphous ribbons Metglas 2605TCA and Fe_73.5Cu₁Nb₃Si_18.5B₄ FINEMET material which is the amorphous precursor of the well-known nanocrystalline material, under different stress, annealing and magnetizing frequency conditions. These parameters were varied in search for different dynamical regimes of the complex system composed by the set of domain walls interacting with a reservoir of defects.