A proportional solenoid (100) of the present invention includes a tubular member (101) in which a first magnetic region (12a) mainly including a ferrite structure, a first semimagnetic region (14a) present at a position spaced apart from an adsorptive surface (11b), the first semimagnetic region including a ferrite structure, a martensite structure, and an austenite structure, and a nonmagnetic region (13) present at a position spaced farther apart from the adsorptive surface than the semimagnetic region, the nonmagnetic region mainly including an austenite structure, are formed continuously and integrally.

A planar magnetic structure includes a closed loop structure having a plurality of core segments divided into at least two sets. A coil is formed about one or more core segments. A first antiferromagnetic layer is formed on a first set of core segments, and a second antiferromagnetic layer is formed on a second set of core segments. The first and second antiferromagnetic layers include different blocking temperatures and have an easy axis pinning a magnetic moment in two different directions, wherein when current flows through the coil, the magnetic moments rotate to form a closed magnetic loop in the closed loop structure.

A reactor includes a coil that includes a wound portion and a magnetic core that is arranged inside of the wound portion and outside of the wound portion, wherein the magnetic core is formed by combining a plurality of core pieces, at least one core piece of the plurality of core pieces is a first core piece constituted by a molded body of a composite material containing a magnetic powder and a resin, the first core piece includes a slit portion in a region arranged inside of the wound portion, a depth direction of the slit portion extends along a direction that intersects an axial direction of the first core piece, and the slit portion is provided so as to be open in an outer peripheral surface of the first core piece on one side of the depth direction and be closed on the other side.

A coil component includes a support substrate, a coil portion disposed on at least one surface of the support substrate, a magnetic body, in which the support substrate and the coil portion are disposed, having a through-portion penetrating through a center of the coil portion, a nonmagnetic layer disposed below the through-portion, and an insulating layer disposed between the nonmagnetic layer and the through-portion.

Embodiments of this application provide a magnetic element and an electronic device. The magnetic element is used in an electronic device. The magnetic element includes a composite magnetic core and a winding. The composite magnetic core includes an external magnetic shell and an internal magnet. The internal magnet is formed by a wound strip material. The external magnetic shell partially or entirely covers a periphery of the internal magnet. The external magnetic shell is fixedly connected to the internal magnet. The winding is on an outer surface of the external magnetic shell. The external magnetic shell is configured to protect the internal magnet from pulling force in a winding process of the winding. The external magnetic shell is configured to increase common-mode impedance of the magnetic element and improve a filtering effect of the magnetic element.

A transformer has a magnetic core, a coil which runs around a core section of the magnetic core, and a filling layer which is arranged between the core section and the coil. The filling layer, which may fill a gap formed between the core and the coil completely, is produced from a magnetizable material.

An electrical component, comprising: a magnetic body and a coil disposed in the magnetic body, wherein the magnetic body comprises a first magnetic powder and a second magnetic powder, wherein the D50 of the first magnetic powder is greater than the D50 of the second magnetic powder, wherein the D90 of the first magnetic powder is not greater than 50 um, and the D90 of the second magnetic powder is not greater than 50 um.

A coupled inductor has two coils made by film or a lithography processes, wherein a first coil is disposed on a top surface of a magnetic sheet and a second coil is disposed on the bottom surface of the magnetic sheet, for controlling the variations of the alignments of the two coils in a smaller range.

An inductor component comprising a spiral wiring wound on a plane; first and second magnetic layers located at positions sandwiching the spiral wiring from both sides in a normal direction relative to the plane of the wound spiral wiring; a vertical wiring extending from the spiral wiring in the normal direction to penetrate at least the inside of the first magnetic layer; and an external terminal disposed on at least a surface of the first magnetic layer to cover an end surface of the vertical wiring. The first magnetic layer is larger than the second magnetic layer in terms of the area of the external terminal viewed in the normal direction, and when A is the thickness of the first magnetic layer and B is the thickness of the second magnetic layer, A/((A+B)/2) is from 0.6 to 1.6.

Provided is a power inductor. The power inductor includes a body including metal powder and a polymer, at least one base provided in the body, and at least one coil pattern disposed on at least one surface of the base. The metal powder includes at least three metal powder of which middle values of grain-size distribution are different from each other.