A soft magnetic alloy powder has a specific composition in which a Co content is large. A soft magnetic alloy powder has a glass transition point Tg and a melting point Tm, 900° C.≤Tm≤1200° C. is satisfied, or when coercivity when applying a pressure X.sub.P to a soft magnetic alloy powder is set as Y.sub.H, and a straight line obtained by linearly approximating a relationship between X.sub.P and Y.sub.H by a method of least squares is set as Y.sub.H=kX.sub.P+1, k (unit: Oe/MPa) satisfies 0≤k≤0.00100.

A coil component includes a body having a winding type coil and a core in which the winding type coil is embedded, and external electrodes disposed on external surfaces of the body. The core includes first and second cores, and the first and second cores are coupled to each other with a bonding surface interposed therebetween. The bonding surface is formed of a same type of resin as the first and second cores. The first and second cores each include a resin directly covering surfaces of magnetic powder particles, such that adjacent particles are separated only by the resin. A method of manufacturing the coil component includes applying a solvent to dissolve a resin on a bonding surface of the first core, and mounting the second core to the bonding surface having the solvent applied thereto.

An example system may include an electromagnet, a drive circuit electrically coupled to the electromagnet, and a controller configured to control the drive circuit to provide current to the electromagnet to generate a pulsing magnetic field. The electromagnet may include a first conductive winding, a second conductive winding, and a magnetic core. The first conductive winding may be crescent shaped. The first conductive winding may define an inner surface and an outer surface. The outer surface of the first conductive winding may include a convex portion and a concave portion. The second conductive winding may reside proximate to the concave portion of the outer surface of the first conductive winding. The outer concave segment of the first conductive winding may define a concavity, and at least a portion of the second conductive winding may reside within the concavity of the first conductive winding.

Provided is a soft magnetic alloy including a Fe-based nanocrystal and metallic glass. A differential scanning calorimetry curve of the soft magnetic alloy has a glass transition point Tg, a temperature rising rate of the soft magnetic alloy in measurement of the differential scanning calorimetry curve is 40 K/minute, and a temperature Tp of a maximum exothermic peak in the differential scanning calorimetry curve is higher than the Tg.

Provided is a soft magnetic alloy having a composition of a compositional formula (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e))P.sub.aC.sub.bSi.sub.cCu.sub.dM.sub.e. X1 is one or more selected from a group consisting of Co and Ni, X2 is one or more selected from a group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, 0, and rare earth elements, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.050a0.17, 0<b<0.050, 0.030<c0.10, 0<d0.020, 0e0.030, 0, 0, and 0+0.50.

Provided is a method of manufacturing a soft magnetic dust core. The method includes: preparing coated powder including amorphous powder made of an Fe-B-Si-P-C-Cu-based alloy, an Fe-B-P-C-Cu-based alloy, an Fe-B-Si-P-Cu-based alloy, or an Fe-B-P-Cu-based alloy, with a first initial crystallization temperature T.sub.x1 and a second initial crystallization temperature T.sub.x2; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than T.sub.x1100 K; and heating to a maximum end-point temperature equal to or higher than T.sub.x150 K and lower than T.sub.x2 with the compacting pressure being applied.

A soft magnetic alloy or the like combining high saturated magnetic flux density, low coercive force and high magnetic permeability having the composition formula (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e))B.sub.aSi.sub.bC.sub.cCu.sub.dM.sub.e. X1 is one more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.140<a0.240, 0b0.030, 0<c<0.080, 0<d0.020, 0e0.030, 0, 0, and 0+0.50 are satisfied.

Provided is a soft magnetic alloy comprising a composition formula (Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b+c+d+e+f))M.sub.aB.sub.bP.sub.cSi.sub.dC.sub.eZn.sub.f. X1 denotes at least one selected from Co and Ni; X2 denotes at least one selected from Cu, Mg, Al, Mn, Ag, Sn, Bi, O, N, S, and rare earth elements; M denotes at least one selected from Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W; 0.080b0.150, 0c0.060, 0d0.060, 0e0.030, 0.0030f0.080, 0.0030a+f0.080, b+c0.100, 0, 0, and 0+0.50 are satisfied; and the soft magnetic alloy has Fe-based nanocrystals with a bcc structure.

A coil component is constituted by a composite magnetic material containing alloy grains whose oxygen atom concentration in their surfaces is 50 percent or less, and resin, and also by a coil. The alloy grains are comprised of first alloy grains and second alloy grains which have different compositions and different average grain sizes. The coil component using the composite magnetic material does not require high pressure when formed.

Disclosed is an iron-based amorphous alloy Fe.sub.aB.sub.bSi.sub.cRE.sub.d, wherein a, b, and c represent, in atomic percentages, the contents of corresponding components, respectively; 83.0a87.0, 11.0<b<15.0, 2.0c4.0, and a+b+c=100; and d is the concentration of RE in the iron-based amorphous alloy, i.e. 10 ppmd30 ppm. The iron-based amorphous alloy has a saturation magnetic induction intensity of no less than 1.63 T, and same can be used to manufacture a magnetic core material for power transformers, motors and inverters.