Soft magnetic powder, powder magnetic core, magnetic element, and electronic device

A soft magnetic powder comprising:

• first particles having a first particle size that passes through a JIS standard sieve with a sieve opening of 45 μm but does not pass through a JIS standard sieve with a sieve opening of 38 μm,
• second particles having a second particle size that pass through the JIS standard sieve with a sieve opening of 38 μm but does not pass through a JIS standard sieve with a sieve opening of 25 μm, and
• third particles having a third particle size that pass through the JIS standard sieve with a sieve opening of 25 μm,
• wherein an average particle size D50 of the first, second, and third particles is in the range of 1 μm to 40 μm,
• wherein each of the first, second, and third particles have a composition comprised of:
• Fe100-a-b-c-d-e-fCuaSibBcMdM′eXf
• wherein M is at least one element selected from a group consisting of Nb, W, Ta, Zr, Hf, Ti, and Mo,
• M′ is at least one element selected from a group consisting of V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, and Re,
• X is at least one element selected from a group consisting of Sb, In, Be, and As, and
• a, b, c, d, e, and f are numbers that represent an atomic percentage (at %) of each element in the composition and satisfy the following formulae:
• 0.1≤a≤3, 0<b≤30, 0<c≤25, 5≤b+c≤30, 0.1≤d≤30, 0≤e≤10, and 0≤f≤10,
• each of the first, second, and third particles have a crystalline structure, the crystalline structure having a diameter of 1 nm or more and 30 nm or less and is contained in an amount of 40 vol % or more, and
• the coercive force Hc1 of the first particles, the coercive force Hc2 of the second particles, and the coercive force Hc3 of the third particles satisfy the relationship that Hc2/Hc1 is 0.85 or more and 1.4 or less, and Hc3/Hc1 is 0.5 or more and 1.5 or less.