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Thickness of FINEMET ribbon after rolling three times at each rollgap and SEM images of rolled surface after rolling at a gap of 0.9 mm (bottom right) and 0.2 mm (upper left) at 2500 × magnification.
Hysteresis loops of the rolled and non-rolled FINEMET samples before and after crystallization. The loops were taken at f = 3 kHz.
AC magnetic properties measured at : (a) the maximum permeability, (b) the real and imaginary parts of the permeability, and (c)the watt loss.
as a function of frequency. The dashed line represents the expected ratio based on the measured thickness reduction.
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