Abstract

The influence of thermomagnetic treatments (TMT) on static hysteresis loops and magnetic losses of Fe73.5CulNb3Si13.5B9 in amorphous and nanocrystalline states was studied. It is established that domain structure destabilization of the nanocrystalline alloy at TMT in a high frequency magnetic field results in maximum decrease of magnetic losses and permeability increase, if a high frequency magnetic field is applied to a sample during the alloy transition from the amorphous to the nanocrystalline state.