Dynamic hysteresis in Finemet thin films

Abstract

We performed a series of dynamic hysteresis measurements on three series of Finemet films with composition Fe${}_{73.5}$Cu${}_1$Nb${}_3$Si${}_{1}3.5$B${}_9$, using both the longitudinal magneto-optical Kerr effect (MOKE) and the inductive fluxometric method. The MOKE dynamic hysteresis loops show a more marked variability with the frequency than the inductive ones, while both measurements show a similar dependence on the square root of frequency. We analyze these results in the frame of a simple domain wall depinning model, which accounts for the general behavior of the data.

3 pages, 3 figures

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