High frequency magnetic response properties by introducing chromium into Fe-Hf-B-O ribbons

High frequency switch-mode power electronics operating has drawn lots of attention these days due to the increasing demand of device miniaturization and faster transient responses. Soft magnetic materials are often employed as core materials for inductors, such as DC-DC convertors and resonant inverters. Thus, magnetic materials with low core loss, large permeability, and high saturation magnetization are attractive candidates in those devices. Traditional metal-based soft magnetic materials usually can only operate below 200 kHz due to large eddy current losses at higher frequencies. Although widely used in MHz frequency range, soft ferrites are enslaved by low saturation magnetization and high synthesis temperature.