To provide a pressed powder magnetic material having excellent work safety during production of a pressed powder magnetic core and imposing less environmental burden; a pressed powder magnetic core having a high magnetic flux density, a high magnetic permeability, a low iron loss, and excellent mechanical strength; and a production method thereof. The pressed powder magnetic core material contains a granulation binder, a soft magnetic powder in which an insulating coating film is formed on the particle surface, and a glass frit whose softening point is a temperature being at least 100 C. lower than a magnetic annealing temperature; the soft magnetic powder being an iron-based amorphous alloy powder, the glass frit being contained in an amount of 0.3 to 1.0% by mass, the granulation binder being a polyvinyl alcohol having a degree of polymerization of 1000 or less and a degree of saponification of 50 to 100% by mole.

The soft magnetic material, the core, and the inductor have high permittivity and excellent DC superimposition characteristic. A soft magnetic material comprising a soft magnetic metal powder and a resin, wherein said soft magnetic metal powder is constituted from a particle group and a particle group , when IA is a peak intensity of the particle group , V is the volume of the particle group , IB is a peak intensity of the particle group , V is the volume of the particle group , and IC is a minimum intensity present between the particle group and the particle group , then an intensity ratio IC/IA satisfies 0.12 or less, and a volume ratio V/V is 2.0 or more and 5.1 or less.

A soft magnetic powder has a composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cM.sub.dM.sub.eX.sub.f (at %) (wherein M is Nb, W, Ta, Zr, Hf, Ti, or Mo, M is V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, or Re, X is C, P, Ge, Ga, Sb, In, Be, or As, and a, b, c, d, e, and f are numbers that satisfy the following formulae: 0.1a3, 0<b30, 0<c25, 5b+c30, 0.1d30, 0e10, and 0f10), wherein a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less is contained in an amount of 40 vol % or more, and the Vickers hardness of the particles is 1000 or more and 3000 or less.

A device is provided with a potential noise radiating source capable of radiating potential noise, a potential noise receiving portion capable of receiving the potential noise and an electromagnetic interference suppression body. The electromagnetic interference suppression body is made by binding flaky soft magnetic metal powder with a binding component and has a sheet-like shape. The electromagnetic interference suppression body is formed with a plurality of slits. The electromagnetic interference suppression body is provided to straddle the potential noise radiating source and the potential noise receiving portion.

A soft magnetic powder of the invention has a composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cM.sub.dM.sub.eX.sub.f (at %) [wherein M is Nb, W, Ta, Zr, Hf, Ti, or Mo, M is V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, or Re, X is C, P, Ge, Ga, Sb, In, Be, or As, and a, b, c, d, e, and f are numbers that satisfy the following formulae: 0.1a3, 0<b30, 0<c25, 5b+c30, 0.1d30, 0e10, and 0f10], wherein a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less is contained in an amount of 40 vol % or more, and the difference in the coercive force of the powder after classification satisfies predetermined conditions.

A soft magnetic powder has a composition represented by Fe.sub.100-a-b-c-d-e-fCu.sub.aSi.sub.bB.sub.cM.sub.dM.sub.eX.sub.f (at %) (wherein M is Nb, W, Ta, Zr, Hf, Ti, or Mo, M is V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, or Re, X is C, P, Ge, Ga, Sb, In, Be, or As, and a, b, c, d, e, and f are numbers that satisfy the following formulae: 0.1a3, 0<b30, 0<c25, 5b+c30, 0.1d30, 0e10, and 0f10), wherein a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less is contained in an amount of 40 vol % or more, and the Vickers hardness of the particles is 1000 or more and 3000 or less.

A compound contains a first soft magnetic powder, a second soft magnetic powder, and a resin composition. The resin composition contains a thermosetting resin. The particle diameter of the first soft magnetic powder is greater than the particle diameter of the second soft magnetic powder. First soft magnetic particles composing the first soft magnetic powder include a metal portion, and an insulating coating film directly covering the metal portion. At least a part of the metal portion is a soft magnetic alloy containing Fe, Cr, and Si. The insulating coating film contains SiO.sub.2. The content of Fe.sub.2O.sub.3 is 0% by atom or more and 10% by atom or less in a surface region of the first soft magnetic particles where a depth from the outermost surface of the first soft magnetic particles is 100 nm or less.