soft magnetic material powder magnetic core, method for producing a soft magnetic material and method for producing a powder magnetic core

摘要

A soft magnetic material comprising: a plurality of metal magnetic particles and an additive comprised of at least one of a metallic soap and an inorganic lubricant with a hexagonal crystal structure, wherein a ratio of the additive to the plurality of metal magnetic particles is 0.001% by mass or more and 0.2 mass% or lower, wherein a variation coefficient Cv (σ / μ), which is a ratio of a standard deviation (σ) of a particle size of metal to a mean particle size (μ) of the same magnetic particles, it is 0.40 or less and a circularity Sf of metallic magnetic particles is 0.80 or greater and 1 or less, wherein the circularity Sf = 4 π x (area of ​​the metal magnetic particle) / (square of the circumference of the metal magnetic particle), wherein the metal magnetic particle is made of iron or iron alloy and in which the area and the circum ference statistically calculated from a projection image of each of the metal magnetic particles