Zipping method applied to Barkhausen noise:: A new tool to investigate the micromagnetic disorder in amorphous magnetic materials

The degree of micromagnetic disorder in magnetic amorphous materials is investigated by applying the packing method to the time series obtained, both from Barkhausen noise experiments and simulations of domain wall motion. The observed dependences of the estimated entropy on the applied stress, in the case of experimentally obtained time series, and the width of the Gaussian noise used in simulations, are explained in terms of two regimes of the effect of an external stress applied. (C) 2006 Elsevier B.V. All rights reserved.