| Popis: |
Based on the AFM observation of the mesoscopic structure and the XRD experimental results of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 nanocrystalline alloy, we proposed a model for exploring the influence of the mesoscopic structure on the soft magntic properties of this kind of Fe-based nanocrystalline alloys, and calculate the frequency function—— D -function for the soft magntic properties of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 nanocrystalline alloy. With the frequency function, we succeeded in exploring the influence of the frequency on the soft magntic properties of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 nanocrystalline alloy. Analysis shows that the D -function is a complex function, the real part Re( D ) shows the inductance and capacitance of nanocrystalline Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 , the imaginary part Im( D ) shows its resistance. We have built an equivalent parallel RLC model for the mesoscopic structure of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 nanocrystalline alloy. Based on the model we have calculated v extGMI = v | Re( D )=0 , which is the condition of maximum GMI value for Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 nanocrystalline alloy, as well as influence of the factors μ , σ , ω , R , H ex and the micro-magntic-structure on the maximum GMI value. |
