A soft magnetic powder including particles having a composition represented by Fe.sub.xCu.sub.aNb.sub.b(Si.sub.1-yB.sub.y).sub.100-x-a-b [provided that a, b, and x are each a number whose unit is at % and satisfy 0.3≤a≤2.0, 2.0≤b≤4.0, and 73.0≤x≤79.5, respectively, and y is a number satisfying f(x)≤y≤0.99, in which f(x)=(4×10.sup.−34)x.sup.17.56], wherein the particle contains a crystal grain having a grain diameter of 1.0 nm or more and 30.0 nm or less, and includes a Cu segregated portion in which Cu is segregated, the Cu segregated portion is present at a position deeper than 30 nm from a surface of the particle, and a maximum Cu concentration in the Cu segregated portion exceeds 6.0 at %.

An inductor according to an embodiment of the present invention comprises: a first magnetic body having a toroidal shape, and including a ferrite; and a second magnetic body disposed on an outer circumferential surface or an inner circumferential surface of the first magnetic body, wherein the second magnetic body includes: resin material and a plurality of layers of metal ribbons wound along the circumferential direction of the first magnetic body, wherein the resin material comprises a first resin material disposed to cover an outer surface of the plurality of layers of metal ribbons, and a second resin material disposed in at least a part of a plurality of layers of interlayer spaces.

A multilayer coil electronic component having improved inductance L, Q, and strength, and which has an element in which a coil conductor and a magnetic element body are stacked. The magnetic element body includes soft magnetic metal particles and a resin. The resin fills a space between the soft magnetic metal particles. Each of soft magnetic metal particles has a soft magnetic metal particle core and an oxide film covering the soft magnetic metal particle core. A layer of the oxide film contacting the soft magnetic metal particle core is made of an oxide including Si.

An insulator-coated soft magnetic powder includes a core particle including a base portion containing a soft magnetic material and an oxide film that is provided on a surface of the base portion and that contains an oxide of an element contained in the soft magnetic material, and an insulating particle that is provided on a surface of the core particle and that has an insulating property, wherein an average particle diameter after heat treatment after being subjected to a heat treatment of heating at 1000° C. is 90% or more and 110% or less of an average particle diameter before heat treatment before being subjected to the heat treatment.

Grain-oriented electrical steel sheet excellent in magnetic properties and excellent in adhesion of a primary coating to a base steel sheet, an annealing separator utilized for manufacture of grain-oriented electrical steel sheet, and a method for manufacturing grain-oriented electrical steel sheet are proposed. The grain-oriented electrical steel sheet is provided with a base metal steel sheet containing comprising a predetermined chemical composition and a primary coating formed on a surface of the base steel sheet and comprising Mg2SiO.sub.4 as a main constituent. The primary coating satisfies the conditions of (1) the number density D3 of the A1 concentrated region: 0.020 to 0.180/μm.sup.2 , (2) (total area S5 of regions which is anchoring oxide layer regions and is also A1 concentrated regions)/(total area S3 of Al concentrated regions)≥33%, (3) distance H5 of mean value of length in thickness direction of regions which is anchoring oxide layer regions and is also A1 concentrated regions minus H0: 0.4 to 4.0 μm, (4) (total area S1 of anchoring oxide layer regions)/(observed area S0)≥15%.

A coil component is capable of suppressing permeation of liquid or gas into a magnetic portion and increasing mechanical strength of the magnetic portion. A coil component includes a magnetic portion including soft magnetic metal particles having an insulating oxide layer on a surface thereof, with the soft magnetic metal particles being bonded to each other with the insulating oxide layer interposed therebetween; and a coil portion provided inside or on the surface of the magnetic portion. A mixture containing a resin and inorganic particles is disposed between the soft magnetic metal particles.

Soft magnetic metal powder which includes a plurality of soft magnetic metal particles configured by a Fe-based nanocrystal alloy including Cu is provided, wherein the soft magnetic metal particles have core portions and first shell portions surrounding circumferences of the core portions; when an average crystallite size of Cu crystallites existing in the core portions is set as A, and the largest crystallite size of Cu crystallites existing in the first shell portions is set as B, B/A is 3.0 or more and 1000 or less.

A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, a third oxide layer, and a fourth oxide layer. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Fe content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, the third oxide layer is a layer where Si content takes a local maximum value, and the fourth oxide layer is a layer where Fe content takes a local maximum value.

The present application relates to a composite material. According to the present application, a composite material having high magnetic permeability and excellent other physical properties such as flexibility, electrical insulation, mechanical properties and/or resistance to heat or oxidation can be provided in a simple and economical process.

An alloy is provided which consists of Fe.sub.100-a-b-c-d-x-y-zCu.sub.aNb.sub.bM.sub.cT.sub.dSi.sub.xB.sub.yZ.sub.z and up to 1 at % impurities, M being one or more of the elements Mo, Ta and Zr, T being one or more of the elements V, Mn, Cr, Co and Ni, Z being one or more of the elements C, P and Ge, 0 at %≤a<1.5 at %, 0 at %≤b<2 at %, 0 at %≤(b+c)<2 at %, 0 at %≤d<5 at %, 10 at %<x<18 at %, 5 at %<y<11 at % and 0 at %≤z<2 at %. The alloy is configured in tape form and has a nanocrystalline structure in which at least 50 vol % of the grains have an average size of less than 100 nm, a hysteresis loop with a central linear region, a remanence ratio Jr/Js of <0.1 and a coercive field strength H.sub.c to anisotropic field strength H.sub.a ratio of <10%.