Abstract
Fe-Cu-Nb-Si-B ferromagnetic microwires had been successfully prepared. Mössbauer spectroscopy had been employed to identify the phases and to find the volume fraction of nanograins. The GHz permeability spectra (0.5–12 GHz) had been measured and fitted with the Lorentzian dispersion law which assumes two ferromagnetic phases simultaneously making contributions to the GHz permeability. Voronoi diagrams were generated to model the nanostructures revealed by HR-TEM and Mössbauer measurements, then the micromagnetics simulations were carried out to simulate the GHz permeability spectra. The results validate that these microwires can exhibit obvious GHz permeability due to their strong shape anisotropic fields and unique two-phases nanostructures.
Published Version
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