Magneto-impedance effect in field- and stress-annealed Fe-based nanocrystalline alloys

Abstract The magneto-impedance (MI) effect in Fe-based nanocrystalline Fe 73 Cu 1 Nb 1.5 Mo 2 Si 13.5 B 9 alloys has been studied. The results showed that the field dependence of the MI ratio is strongly influenced by the transverse magnetic anisotropy in samples, which results from annealing in a transversal magnetic field or a longitudinal tensile stress. A large MI ratio of 100% and a slope of 660%/Oe were reached in samples exhibiting transverse anisotropy.