Magnetic Properties of Nanocrystalline Fe83Sn5B12 Alloys after Electron Irradiation of Precursor

Precursor of nanocrystalline Fe83Sn5B12 alloy was irradiated by electron beams of doses up to 4 MGy. Irradiation affected the magnetic microstructure of the amorphous and nanocrystalline alloy. This was manifested as a change in the direction of the net magnetic moment, intensity of the internal magnetic field, and volumetric fraction of the constituent phases. All these parameters were determined from the measured Mssbauer spectra. The direction of the net magnetic moment was the most sensitive parameter. Structural changes were identified by Mssbauer spectroscopy as the ratio of the amorphous to the crystalline component. Irradiation of the amorphous precursor has been reflected also at the shape and parameters of hysteresis loop. The results indicates the changes of the microscopic magnetic parameters due to electron irradiation.