Iron-based nanocrystalline magnetic core with low coercive force and low magnetic conductivity and preparation method

The invention provides an iron-based nanocrystalline magnetic core with low coercive force and low magnetic conductivity and a preparation method of the iron-based nanocrystalline magnetic core, and relates to the technical field of amorphous nanocrystalline magnetic core preparation. According to the method provided by the invention, the nanocrystalline magnetic core with low coercive force and low constant magnetic conductivity can be prepared, and the magnetic conductivity attenuation in the frequency range of 10kHz-1MHz is not more than 10%. Meanwhile, compared with magnetic field annealing, the heat treatment time within 5 min is short, and the industrial production process is shortened; and the low heat treatment temperature is beneficial to environmental protection and energy conservation to a certain extent, so that the cost is relatively low, and the application prospect is relatively good.