Abstract
We demonstrate that Ni-Fe-fine-particle films have potential for use as high-frequency conduction noise suppressors in the quasi-microwave band. Ni-Fe- Sm2O3, MgF2, and B2O3 films with different volume fractions of Ni80Fe20 were produced. Samples with soft magnetic properties and electrical resistivity (ρ) higher than 104 (μΩcm) were obtained. Their resistivity is hundreds of times higher than that of Fe-Al-O granular films, and the magnetic resonance loss is several tens of times higher than that of commercially used noise suppressors in the quasi-microwave band. These results suggest that thin-film current noise suppressors that can be integrated into micron-scale electric-devices could be produced by using these films.
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