Magnetic Properties of Soft Magnetic Composites Based on Iron Powder with a Multilayer Insulating Coating

The magnetic properties of the soft magnetic composites based on an ABC100.30 iron powder with a phosphorus oxide insulating coating of different thicknesses have been studied. It has been found that the composites with a trilayer particle coating exhibit the minimum of magnetic hysteresis value. This causes a decrease in the magnetization reversal loss in the materials with a trilayer insulating coating by an order of magnitude as compared with the loss in the composites based on the powders with a single-layer particle coating. The developed materials with a permeability of μ = 100–150 and an induction of up to 1.8 T are promising for use in various electrical devices operating in the frequency range of up to 1 MHz.