Annular magnetic core using Fe-based nanocrystalline soft magnetic alloy, and magnetic component using the same

摘要

Made of Fe-based nanocrystalline soft magnetic alloy in which part of Fe is replaced by Ni and / or Co, and the AC relative permeability μr100k (50) at a frequency of 100 kHz and a DC applied magnetic field strength of 50 A / m is 4000 or more. The AC relative permeability μr100k (150) at a frequency of 100 kHz and a DC applied magnetic field strength of 150 A / m is 2500 or more, and the maximum permeability μMax at a DC applied magnetic field strength of 400 A / m is 8000 or less. An annular magnetic core with a density B400 of 1.3 T or more.