Why are soft ferrites especially useful at high frequencies?

Soft ferrites are particularly useful in high-frequency electronic applications primarily due to their high electrical resistivity.12

When magnetic materials are subjected to rapidly fluctuating magnetic fields, these fields induce eddy currents within the material. These currents are undesirable because they cause energy loss in the form of heat, which becomes increasingly problematic as the frequency of the magnetic field increases.12

Unlike metallic magnetic materials, soft ceramic ferrites possess high electrical resistance, which effectively suppresses the formation of these eddy currents. By minimizing energy loss through this mechanism, soft ferrites remain efficient and stable in high-frequency environments, making them ideal for use in components such as telecommunications equipment, switching regulators, and high-frequency power transformers.312