Abstract
The effects of nitridation on the permeability-frequency spectra in Nanoperm alloys were studied. In the initial stage of nitridation, the nitrogen atom diffusion into Nanoperm alloys may make the extent of increase of the relaxation frequency f0 exceed the extent of decrease of initial permeability μi. However, as the materials are nitrided for 200 min in a nitrogen atmosphere of 0.03 MPa at 400°C, μif0 shows a tendency to be constant and the increase of the strength of domain wall pinning with nitriding time becomes the main factor affecting the dynamic magnetization process. Nitridation can improve the soft magnetic properties of nanocrystalline soft magnetic materials in the higher frequency range.
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