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Microstructure and magnetic properties of the (Fe x Co 1 ) 76 Mo 8 Cu 1 B 15 amorphous metallic alloys (x = 3, 6, and 9) are investigated by macroscopic magnetic measurements as well as a local probe technique. The microstructure of alloys is described using the findings from Mössbauer spectrometry. Study of magnetic characteristics was aimed at obtaining optimal initial parameters for simulation process in choke cores. The results obtained from numerical analysis of choke cores, i.e., core losses and winding losses were compared with the same parameters obtained for commercial materials such as FINEMET and Fe-3.2% Si alloys. Analysis of the magnetic properties shows that the investigated material can be applied in highly sensitive electrical devices.

DC thermomagnetic properties of Fe51Co12Si16B8Mo5P8 amorphous alloy in the as-quenched and after annealing below crystallization temperature are investigated. They are related to deviations in the microstructure as revealed by Mössbauer spectrometry. Study of AC magnetic properties, i.e. hysteresis loops, relative permeability and core losses versus maximum induction was aimed at obtaining optimal initial parameters for simulation process of a resonant transformer for a rail power supply converter. The results obtained from numerical analyses including core losses, winding losses, core mass, and dimensions were compared with the same parameters calculated for Fe-Si alloy and ferrite. Moreover, Steinmetz coefficients were also calculated for the as-quenched Fe51Co12Si16B8Mo5P8 amorphous alloy.

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