A structure for wireless communication having a plurality of conductor layers, an insulator layer separating each of the conductor layers, and at least one connector connecting two of the conductor layers wherein an electrical resistance is reduced when an electrical signal is induced in the resonator at a predetermined frequency. The structure is capable of transmitting or receiving electrical energy and/or data at various near and far field magnetic coupling frequencies.

A structure for wireless communication having a plurality of conductor layers, an insulator layer separating each of the conductor layers, and at least one connector connecting two of the conductor layers wherein an electrical resistance is reduced when an electrical signal is induced in the resonator at a predetermined frequency. The structure is capable of transmitting or receiving electrical energy and/or data at various near and far field magnetic coupling frequencies.

The invention relates to a method for producing iron oxide-based composite magnetic nanocomposites, for modulating the magnet grade of the magnetic nanocomposites to, for example, a soft magnetic material, or a semi-hard magnetic material, or a hard magnetic material, comprising the following steps: a0) separate dissolutions of precursors and of a base a) introduction at room temperature of an iron-based precursor (F) and of at least one metal precursor (M) other than an iron-based precursor, and of at least one base (B), and optionally of at least one rare earth precursor (R), in a given order of introduction into the autoclave b) hydrothermal and/or solvothermal production, so as to obtain magnetic nanocomposites which have a main phase and one or more secondary phases M′.sub.2(OH).sub.2O.sub.2 and/or R(OH).sub.3, c) a step of washing the nanocomposites.

The invention relates to a method for producing iron oxide-based composite magnetic nanocomposites, for modulating the magnet grade of the magnetic nanocomposites to, for example, a soft magnetic material, or a semi-hard magnetic material, or a hard magnetic material, comprising the following steps: a0) separate dissolutions of precursors and of a base a) introduction at room temperature of an iron-based precursor (F) and of at least one metal precursor (M) other than an iron-based precursor, and of at least one base (B), and optionally of at least one rare earth precursor (R), in a given order of introduction into the autoclave b) hydrothermal and/or solvothermal production, so as to obtain magnetic nanocomposites which have a main phase and one or more secondary phases M′.sub.2(OH).sub.2O.sub.2 and/or R(OH).sub.3, c) a step of washing the nanocomposites.

A coil component includes a magnetic body portion that includes metallic particles and a resin material, a coil conductor that is embedded in the magnetic body portion, and a first outer electrode and a second outer electrode each of which is electrically connected to the coil conductor. At least a portion of an outer layer of the magnetic body portion forms an electrically conductive layer that includes a second metallic material having a specific resistance lower than a specific resistance of a first metallic material forming the metallic particles. The electrically conductive layer includes a first electrically conductive layer that is electrically connected to the first outer electrode and a second electrically conductive layer that is electrically connected to the second outer electrode. The first electrically conductive layer and the second electrically conductive layer are electrically isolated from each other.

The present invention relates to a magnetorheological fluid and a manufacturing method thereof. The magnetorheological fluid according to the present invention includes: a dispersion medium; magnetic particles; and a thixotropic agent, in which the magnetorheological fluid has viscoelasticity, and when shear stress τ of the viscoelasticity of the magnetorheological fluid is τ = τ.sub.0sin(wt) and shear strain γ is γ = γ.sub.0sin(wt + δ) = G′sin(wt) + G″cos [G′ is referred to storage modulus and G″ is referred to as loss modulus], when a magnetic field is applied, the slope of G″ is equal to or less than 0 for the range from 0.01% shear strain applied to the magnetorheological fluid to the shear strain value satisfying tan δ = G″ / G′= 1.

The present invention relates to a magnetorheological fluid and a manufacturing method thereof. The magnetorheological fluid according to the present invention includes: a dispersion medium; magnetic particles; and a thixotropic agent, in which the magnetorheological fluid has viscoelasticity, and when shear stress τ of the viscoelasticity of the magnetorheological fluid is τ = τ.sub.0sin(wt) and shear strain γ is γ = γ.sub.0sin(wt + δ) = G′sin(wt) + G″cos [G′ is referred to storage modulus and G″ is referred to as loss modulus], when a magnetic field is applied, the slope of G″ is equal to or less than 0 for the range from 0.01% shear strain applied to the magnetorheological fluid to the shear strain value satisfying tan δ = G″ / G′= 1.

A grain-oriented electrical steel sheet includes: a steel sheet and optionally an insulation coating formed on the steel sheet, in which, in a case where a heat treatment of performing retention at 800° C. for 2 hours is performed, regarding a time-magnetostriction waveform (t−λ waveform) when magnetized to 1.7 T, a peak value of a difference waveform obtained by subtracting the time-magnetostriction waveform after the heat treatment from the time-magnetostriction waveform before the heat treatment is 0.01×10.sup.−6 or more and 0.20×10.sup.−6 or less, and a difference obtained by subtracting an iron, loss before the heat treatment from an iron loss after the heat treatment is 0.03 W/kg or more and 0.17 W/kg or less.

A manufacturing method of a coil component comprising the steps of: preparing a coil assembly body in which a coil is attached on a magnetic core and a mold body which is formed with a cavity portion in the inside thereof and which includes at least one opening portion, putting a viscous admixture including magnetic powders and thermosetting resin and the coil assembly body in the cavity portion, pushing the put-in viscous admixture in the mold body, and thermally-curing the pushed-in viscous admixture and forming a magnetic exterior body which covers the coil assembly body.

An R—Fe—B base sintered magnet is provided consisting essentially of R (which is at least two rare earth elements and essentially contains Nd and Pr), M.sub.1 which is at least two of Si, Al, Mn, Ni, Cu, Zn, Ga, Ge, Pd, Ag, Cd, In, Sn, Sb, Pt, Au, Hg, Pb, and Bi, M.sub.2 which is at least one of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W, boron, and the balance of Fe, and containing an intermetallic compound R.sub.2(Fe,(Co)).sub.14B as a main phase. The magnet contains an R—Fe(Co)-M.sub.1 phase as a grain boundary phase, the R—Fe(Co)-M.sub.1 phase contains A phase which is crystalline with crystallites of at least 10 nm formed at grain boundary triple junctions, and B phase which is amorphous and/or nanocrystalline with crystallites of less than 10 nm formed at intergranular grain boundaries and optionally grain boundary triple junctions.