SOFT MAGNETIC MATERIAL, DUST CORE, METHOD FOR PRODUCING SOFT MAGNETIC MATERIAL, AND METHOD FOR PRODUCING DUST CORE

摘要

Disclosed is a soft magnetic material containing a plurality of composite magnetic particles (30) each having an iron-based particle (10) containing iron and an insulating coating film (20) covering the surface of the iron-based particle (10). The insulating coating film contains an organic group derived from an organic acid containing at least one substance selected from the group consisting of titanium, aluminum, silicon, calcium, magnesium, vanadium, chromium, strontium and zirconium. At least one substance in the insulating coating film (20) is bonded with iron in the iron-based particle (10) through the organic group of the insulating coating film (20) which is derived from an organic acid. Also disclosed is a method for producing a soft magnetic material, which comprises a step for preparing an iron-based particle (10) containing iron and a step for forming an insulating coating film (20) covering the surface of the iron-based particle (10). In the step for forming an insulating coating film, an organic acid containing the above-mentioned substance is brought into contact with the surface of the iron-based particle (10).