An amorphous soft magnetic alloy of the formula (Fe.sub.1-αTM.sub.α).sub.100-w-x-y-zP.sub.wB.sub.xL.sub.ySi.sub.z Ti.sub.pC.sub.qMn.sub.rCu.sub.s, wherein TM is Co or Ni; L is Al, Cr, Zr, Mo or Nb; 0≤α≤0.3, 2≤w≤18 at %, 2≤x≤18 at %, 15≤w+x≤23 at %, 1<y≤5 at %, 0≤z≤4 at %; p, q, r, and s represents an addition ratio such that the total mass of Fe, TM, P, B, L and Si is 100, and 0≤p≤0.3, 0≤q≤0.5, 0≤r≤2, 0≤s≤1 and r+s>0; the composition fulfills one of the following conditions: L is Cr, Zr, Mo or Nb; or L is a combination of Al and Cr, Zr, Mo or Nb, wherein 0<Al≤5 at %, 1≤Cr≤4 at %, 0<Zr≤5 at %, 2≤Mo≤5 at %, and 2≤Nb≤5 at %; the alloy has a crystallization start temperature (Tx) which is 550° C. or less, a glass transition temperature (Tg) which is 520° C. or less, and a supercooled liquid region represented by ΔTx=Tx−Tg, which is 20° C. or more.

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 at least one element selected from the group consisting of Nb and the like, M′ is at least one element selected from the group consisting of V and the like, X is at least one element selected from the group consisting of C and the like, and 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). The powder contains a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less in an amount of 40 vol % or more. When the apparent density is assumed to be 100, the tap density is 103 or more and 130 or less.

A multipole permanent magnet may be provided with a magnetic-field shunt. The multipole permanent magnet may be formed from compression-molded magnetic particles such as magnetically anisotropic rare-earth particles in an elastomeric polymer. The magnetic-field shunt may be formed from magnetic members in a polymer binder that are separated by gaps to allow the shunt to flex or from magnetic particles in a polymer binder. The magnetic particles in the polymer binder may be ferrite particles or other magnetic particles. The polymer binder may be formed from an elastomeric material and may be integral with the elastomeric polymer of the multipole permanent magnet or separated from the elastomeric polymer of the multipole permanent magnet by a polymer separator layer. Conductive particles may be formed in polymer such as the elastomeric polymer with the magnetic particles. The conductive particles may be configured to form electrical connector contacts and other signal paths.

In an embodiment, a magneto-dielectric material comprises a polymer matrix; a plurality of hexaferrite microfibers; wherein the magneto-dielectric material has a permeability of 2.5 to 7, or 2.5 to 5 in an x-direction parallel to a broad surface of the magneto-dielectric material and a magnetic loss tangent of less than or equal to 0.03; as determined at 1 GHz, or 1 to 2 GHz.

A coil component includes a magnetic portion that includes metal particles and a resin material, a coil conductor embedded in the magnetic portion, and outer electrodes electrically connected to the coil conductor. The bottom surface of the magnetic portion includes grooves, and end portions of the coil conductor, extend into the grooves.

A coil component includes a magnetic portion that includes metal particles and a resin material, a coil conductor embedded in the magnetic portion and having a core portion, and outer electrodes electrically connected to the coil conductor. The magnetic portion includes a magnetic outer coating and a magnetic base having a protrusion portion. The coil conductor is disposed on the magnetic base such that the protrusion portion is located in the core portion. The magnetic outer coating is disposed so as to cover the coil conductor, and the bottom surface of the magnetic base includes a recessed portion in an area opposite to the protrusion portion.

In a coil-embedded dust core constituting an inductance element, a winding body of a coil disposed inside a coil-embedded dust core and a dust core have a relationship that the inner core volume ratio RV defined below is 3 or more and 5 or less: RV=(V1/V2)/(1V/Vp), where V1 represents a volume of a region in the dust core located on an inner side of the winding body of the coil when the coil-embedded dust core is viewed in a first direction, which is a direction along a winding axis of the coil, V2 represents a volume of a region in the dust core located on an outer side of the winding body of the coil when the coil-embedded dust core is viewed in the first direction, V represents a volume of the dust core, and Vp represents a volume of the coil-embedded dust core.

Provided is a power inductor. The power inductor includes a body, at least one base material disposed within the body, at least one coil pattern disposed on at least one surface of the base material, an insulation film disposed between the coil pattern and the body, and an external electrode disposed outside the body and connected to the coil pattern. The body includes a plurality of magnetic layers and insulation layers, which are alternately laminated.

A soft magnetic powder according to the present disclosure comprises a particle which comprises a plurality of nanosized crystallites and an amorphous phase existing around the crystallites, wherein the crystallites have an average grain diameter of 30 nm or less, and the amorphous phase has an average thickness of 30 nm or less; and wherein when a minor axis of a cross section of the particle is determined as r, an average Fe concentration in the amorphous phase is lower than an average Fe concentration in the crystallites in a region where a depth from a surface of the particle is 0.2 r or more and 0.4 r or less.

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.