Moessbauer Study of Magnetic Structure in Fe-Based Nanocrystalline Alloys for MI Effect

The magneto-impedance effect in Fe-based nanocrystalline Fe73Cu1Nb1.5Mo2Si13.5B9 alloys has been observed. The results showed that the field dependence of the MI ratio was strongly influenced by the transverse magnetic structure in samples, which was demonstrated by Moessbauer spectroscopy.