Abstract: Provided is a magnetic core in which metal magnetic particles occupy an area of 75% to 90% on a cross-section. The metal magnetic particles include first large particles having a nanocrystal structure and having a Heywood diameter of 3 ?m or more on the cross-section of the magnetic core, and second large particles having an amorphous structure and having a Heywood diameter of 3 ?m or more, and an insulation coating of the first large particles is thicker than an insulation coating of the second large particles.

Abstract: A soft magnetic metal powder comprising soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part having an insulation property, and the coating part includes a soft magnetic metal fine particle.

Abstract: A soft magnetic alloy including an internal area having a soft magnetic type alloy composition including Fe and P (phosphorous), and a P concentrated area existing closer to a surface side than the internal area and having a higher P concentration than in the internal area.

Abstract: A soft magnetic alloy comprising an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, a SB concentrated area existing closer to the surface side than the Co concentrated area and having a higher concentration of at least one element selected from Si and B than in the internal area, and a Fe concentrated area including Fe existing closer to the surface side than the SB concentrated area; wherein a crystalized area ratio of the SB concentrated area represented by SSBcry/SSB and a crystalized area ratio of the Fe concentrated area represented by SFecry/SFe, satisfy a relation of (SSBcry/SSB)<(SFecry/SFe).

Abstract: A magnetic core includes metal magnetic particles. A total area percentage of the metal magnetic particles in a cross section of the magnetic core is 75% or more and 90% or less. The metal magnetic particles include first particles whose Haywood diameters in the cross section of the magnetic core are 3 ?m or more and second particles whose Haywood diameters in the cross section of the magnetic core are less than 3 ?m. The second particles include two or more types of small particles with different compositions of films existing on their particle surfaces.

Abstract: A polymer particle containing magnetic material includes a core, an intermediate layer, and a polymer layer. The core includes magnetic fine particles having an average diameter of 5 nm or more and 30 nm or less. The intermediate layer is located outside the core and has a lower concentration of the magnetic fine particles than the core. The polymer layer covers the intermediate layer. A thickness of the intermediate layer is 5% or more and 60% or less of a radius of the polymer particle containing magnetic material.

Abstract: An inductor includes a magnetic core portion and a coil portion. The magnetic core portion is a multilayer film in which a nanogranular magnetic film and a soft magnetic alloy film are alternately stacked. The nanogranular magnetic film has a structure in which nano-domains of a first phase are dispersed in a second phase. The first phase contains one or more selected from Fe and Co, and the second phase contains one or more selected from O, N, and F. The volume ratio of the first phase to the total volume of the first phase and the second phase is 60% or less. The soft magnetic alloy film contains one or more selected from Fe and Co. The total amount of Fe, Co, and Ni in the soft magnetic alloy film is 70 at % or more.

Abstract: The present invention provides a soft magnetic alloy having good soft magnetic properties. The soft magnetic alloy includes nanocrystals having an average Heywood diameter value of 5.0 nm or more and 25.0 nm or less, in which an average circularity of the nanocrystals is 0.50 or more and 0.90 or less.

Abstract: Provided is a soft magnetic metal powder including a plurality of soft magnetic metal particles. Each of the soft magnetic metal particles includes a metal particle and an oxidized part covering the metal particle. The metal particle includes at least Fe. The oxidized part includes an oxide of at least one kind of element selected from the group consisting of Fe, Si, and B, and at least one kind of element of Ca and Mg. A concentration of Ca or Mg in the metal particle and the oxidized part is maximum in the oxidized part. An average value of a maximum value of the concentration of Ca or Mg in the oxidized part is 0.2 atom % or more.

Abstract: A metal magnetic powder contains Co as a main component, and the metal magnetic powder includes metal nanoparticles having a mean particle size (D50) of 1 nm or more and 100 nm or less. Each of the metal nanoparticles includes hcp-Co as a main phase, and the metal magnetic powder includes fcc-Co and/or ?-Co as a sub-phase.

Abstract: A soft magnetic metal powder having soft magnetic metal particles, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Si as a main component, the second coating part includes oxides of Fe as a main component, and the third coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.

Abstract: A soft magnetic alloy including an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, and a SB concentrated area existing closer to the surface side than the Co concentrated area and having a higher concentration of at least one element selected from Si and B than in the internal area.

Abstract: A soft magnetic alloy comprising a main component having a compositional formula of ((Fe(1?(?+?))X1?X2?)(1?(a+b+c))MaBbCrc)1?dCd, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi and rare earth elements, “M” is selected from the group Nb, Hf, Zr, Ta, Mo, W and V, 0.030?a?0.14, 0.005?b?0.20, 0<c?0.040, 0?d?0.040, ??0, ??0, and 0??+??0.50 are satisfied, when soft magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10?P/S?10.

Abstract: A soft magnetic metal powder having soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part and a second coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Fe as a main component, the second coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn, and a ratio of trivalent Fe atom among Fe atoms of oxides of Fe included in the first coating part is 50% or more.

Abstract: A nanogranular magnetic film comprises a structure including first phases comprised of nano-domains dispersed in a second phase. A ratio of a volume of the first phases to a total volume of the first phases and the second phase is 65% or less. A largest one of A(Fe1)/A(Fe2), A(Co1)/A(Co2), and A(Ni1)/A(Ni2) has a value of 1.20 or more and 8.00 or less, provided that a percentage of Fe in the first phases is A(Fe1), a percentage of Fe in the second phase is A(Fe2), a percentage of Co in the first phases is A(Co1), a percentage of Co in the second phase is A(Co2), a percentage of Ni in the first phases is A(Ni1), and a percentage of Ni in the second phase is A(Ni2). The first phases comprised of the nano-domains have an average size of 2 nm or more and 30 nm or less.

Abstract: A soft magnetic metal powder that has low coercivity Hcj and high saturation magnetic flux density Bs, and has high powder resistivity and high insulating performance is obtained. The soft magnetic metal powder is soft magnetic metal powder containing Fe. The soft magnetic metal powder has particles each including a soft magnetic metal portion and a coating portion coating the soft magnetic metal portion. The coating portion includes a first coating portion and a second coating portion. The first coating portion is closer to the soft magnetic metal portion than the second coating portion. The first coating portion and the second coating portion have oxides containing at least one element selected from Si, Fe, and B as a main component. The first coating portion includes amorphous material, the second coating portion includes crystals, and the second coating portion has a higher crystal content ratio than the first coating portion.

Abstract: A magnetic core, containing metal magnetic powder and resin, in which a content of the metal magnetic powder satisfies 60%?(A1/A2)?90%. The metal magnetic powder includes small particles having the Heywood diameter of 1 ?m or less in the cross section of the magnetic core and large particles having the Heywood diameter of 5 ?m or more and less than 40 ?m. An edge-to-edge distance regarding to a distance between the small particles satisfies 5?((L1av/dav)×100)?70. An edge-to-edge distance regarding to a distance between the small particles and the large particles satisfies 0.02 ?m?L2av?0.13 ?m and ??0.25 ?m.

Abstract: A nanogranular magnetic film includes a structure including first phases comprised of nano-domains dispersed in a second phase. The first phases include at least one selected from the group consisting of Fe, Co, and Ni. The second phase includes at least one selected from the group consisting of O, N, and F. A ratio of a volume of the first phases to a total volume of the first phases and the second phase is 65% or less. A noble gas element is included at 0.20 at % or more and 0.80 at % or less.

Abstract: A nanogranular magnetic film includes a structure including first phases comprised of nano-domains dispersed in a second phase. The first phases include at least one selected from the group consisting of Fe, Co, and Ni. The second phase includes at least one selected from the group consisting of O, N, and F. A ratio of a volume of the first phases to a total volume of the first phases and the second phase is 65% or less. The nanogranular magnetic film has a porosity of 0.17 or more and 0.30 or less.

Abstract: According to an aspect, a soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Sz of a surface of the coating part is 10 to 700 nm. According to another aspect, a soft magnetic metal powder includes a plurality of soft magnetic metal particles containing iron, a surface of each of the soft magnetic metal particles is covered with a coating part, and a maximum height Rz of a surface of the coating part is 10 to 700 nm.