Mössbauer Spectrometry Applied to Soft Magnetic Alloys Influenced by External Factors

Abstract

ABSTRACT A review of recent 57Fe Mössbauer Spectrometry (MS) studies of external influence on the properties of amorphous and nanocrystalline Fe-based alloys is presented in this paper. Two types of Fe-containing alloys (FeCuNbSiB and CoFeZrB) in the form of original amorphous and nanocrystalline ribbons were subjected to different external factors: high temperatures, different annealing atmosphere, mechanical and tensile stress. It will be shown that the Mössbauer Spectrometry is a suitable tool for such studies because the measured spectral parameters are very sensitive to the changes in the vicinity of the probe 57Fe-nuclei and thus, this technique provides a wide variety of information about structural and magnetic behaviour of Fe-containing materials. The most sensitive parameters were hyperfine magnetic field in crystalline component, average hyperfine field in amorphous component and direction of net magnetic moment. The considered external factors modified the amorphous as well as nanocrystalline structure, which was determined by MS phase analysis.JRC.F.4-Nuclear design safet