Barkhausen noise in the reentrant system Ni(1-X) Mn(x) : a study of the power spectra

Abstract

In this article, the power spectra of the Barkhausen noise of Ni1-x Mnx is presented. The measurements were made in the ferromagnetic phase at several temperatures and manganese concentrations in order to map the effects of the degree of disorder and of the temperature on domain wall dynamics. Measurements in standard ferromagnetic materials were also made to compare the dynamics in both cases.