Provided is soft magnetic powder containing an amorphous metal particle having a composition expressed by a compositional formula Fe.sub.100-a-b-c-d-e-f-gCr.sub.aSi.sub.bB.sub.cC.sub.dAl.sub.eTi.sub.fCo.sub.g. Here, a, b, c, d, e, f, and g are that express atom %, 0<a≤3.0, 5.0≤b≤15.0, 7.0≤c≤15.0, 0.1≤d≤3.0, 0<e≤0.016, 0<f≤0.009, and 0≤g≤0.025.

The present invention relates to a non-grain-oriented electrical steel sheet which is excellent in high-frequency iron loss, and a manufacturing method thereof.

A non-grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 2.5 to 3.8 wt % of Si, 0.5 to 2.5 wt % of Al, 0.2 to 4.5 wt % of Mn, 0.0005 to 0.02 wt % of As, 0.0005 to 0.01 wt % of Bi, the balance Fe, and inevitable impurities, and satisfies the following [Equation 1].

0.3≤[surface fine crystal grain diameter]×[fine grain formation thickness]×([As]/[Bi])≤5.0  [Equation 1]

In Equation 1, [surface fine crystal grain diameter] means an average particle diameter (μm) of fine crystal grains in an electrode surface layer of an electrical steel sheet, [fine grain formation thickness] means a thickness (mm) of an electrode surface layer in which fine crystal grains are formed, and [As] and [Bi] mean a composition (wt %) of As and a composition (wt %) of Bi, respectively.

A wireless device having electromagnetic shielding for a coil includes a composite magnetic sheet. The composite magnetic sheet includes first and second magnetic sheet parts. The first magnetic sheet part has a stacked structure of magnetic sheets including a surface which is an outermost surface of the first magnetic sheet part. The second magnetic sheet part is disposed on the outermost surface of the first magnetic sheet part. At least one magnetic sheet of the first magnetic sheet part includes a cracked structure and the second magnetic sheet part does not include a cracked structure. A protective member is disposed above the composite magnetic sheet. A coil is disposed below the composite magnetic sheet. A magnetic sheet of the first magnetic sheet part with a cracked structure has a surface roughness or porosity greater than that of the second magnetic sheet part without a cracked structure.

A soft magnetic alloy having a good combination of formability and magnetic properties is disclosed. The alloy has the formula

Fe.sub.100-a-b-c-d-e-fSi.sub.aM.sub.bL.sub.cM′.sub.dM″.sub.eR.sub.f

wherein M is Cr and/or Mo; L is Co and/or Ni; M′ is one or more of Al, Mn, Cu, Ge, Ga; M″ is one or more of Ti, V, Hf, Nb, W; and R is one or more of B, Zr, Mg, P, Ce. The elements Si, M, L, M′, M″, and R have the following ranges in weight percent:

TABLE-US-00001 Si   4-7 M 0.1-7 L 0.1-10 M′ up to 7 M″ up to 7 R up to 1

The balance of the alloy is iron and usual impurities. A thin-gauge article made from the alloy and a method of making the thin-gauge article are also disclosed.

Grain-oriented electrical steel sheet excellent in coating adhesion and magnetic properties is provided. The method for manufacturing grain-oriented electrical steel sheet excellent in coating adhesion and magnetic properties includes a process of heating to 1280° C. or more and hot rolling a slab containing, by mass %, Bi and a predetermined composition of constituents and having a balance of Fe and impurities so as to obtain hot rolled steel sheet, a process, after hot rolling annealing the hot rolled steel sheet, of cold rolling it one time or cold rolling it two times or more with process annealing performed interposed so as to obtain cold rolled steel sheet, a process of rapidly heating then decarburization annealing the steel sheet, a process of coating the surface of the cold rolled steel sheet after decarburization annealing with an annealing separator containing predetermined compounds including sulfates or sulfides and having MgO as its main constituent, then performing finish annealing, a process of performing strictly controlled finish annealing, and a process of coating an insulating coating, then performing flattening annealing.

A light-emitting device can be folded in such a manner that a flexible light-emitting panel is supported by a plurality of housings which are provided spaced from each other and the light-emitting panel is bent so that surfaces of adjacent housings are in contact with each other. Furthermore, in the light-emitting device, in which part or the whole of the housings have magnetism, the two adjacent housings can be fixed to each other by a magnetic force when the light-emitting device is used in a folded state.

This non-oriented electrical steel sheet includes a base metal having a predetermined chemical composition satisfying the expression [Si+sol. Al+0.5×Mn≥4.3], and an average grain size of the base metal is more than 40 μm and 120 μm or less.

A light-emitting device can be folded in such a manner that a flexible light-emitting panel is supported by a plurality of housings which are provided spaced from each other and the light-emitting panel is bent so that surfaces of adjacent housings are in contact with each other. Furthermore, in the light-emitting device, in which part or the whole of the housings have magnetism, the two adjacent housings can be fixed to each other by a magnetic force when the light-emitting device is used in a folded state.

A magnetic resin composition uses, as magnetic particles (B), scale-like particles that are formed of an Fe—Si—Al alloy, and has a mass ratio of a thermoplastic resin (A) that has a melting point of from 100° C. to 400° C. to the Fe—Si—Al alloy of from 10/90 to 15/85; and a cross-sectional surface (52) in the thickness direction of a sheet (50) that is formed from this magnetic resin composition (1) satisfies the conditions (1) and (2) described below. (1) The total area of the magnetic particles (B) subjected to image processing is from 40% to 65% of the area of the image processing region. (2) The number of the magnetic particles (B) subjected to image processing is from 200 to 500.

A non oriented electrical steel sheet includes, as a chemical composition, by mass %, 1.0% or more and 5.0% or less of Si, wherein a sheet thickness is 0.10 mm or more and 0.35 mm or less, an average grain size is 30 μm or more and 200 μm or less, an X1 value defined by X1=(2×B.sub.50L+B.sub.50C)/(3×I.sub.S) is less than 0.845, an E1 value defined by E1=E.sub.L/E.sub.C is 0.930 or more, and an iron loss W.sub.10/1k is 80 W/kg or less.