Investigation of scaling properties of hysteresis in Finemet thin films

Abstract

We study the behavior of hysteresis loops in Finemet Fe$_{73.5}$Cu$_1$Nb$_3$Si$_{18.5}$B$_4$ thin films by using a fluxometric setup based on a couple of well compensated pickup coils. The presence of scaling laws of the hysteresis area is investigated as a function of the amplitude and frequency of the applied field, considering sample thickness from about 20 nm to 5 $\mu$m. We do not observe any scaling predicted by theoretical models, while dynamic loops show a logarithmic dependence on the frequency.Comment: 2 pages, 2 figure

The Concept of Scaling Analysis Describing the Properties of Soft Magnets

“…Various types of scaling analysis have been used in many aspects of modelling soft magnetsstarting from the analysis of phase transitions and critical phenomena around Curie temperature [3], [4] -by the description of Barkhausen effect [5], [6] -and up to the analysis of material macroscopic properties such as excess hysteresis losses [7], dynamic hysteresis [8] or minor hysteresis loops [9], [10] that are the most interesting issues from the engineering point of view.…”