Provided is an amorphous alloy soft magnetic powder having a composition represented by the following formula: (Fe.sub.xCo.sub.(1?x)).sub.(100?(a+b))(Si.sub.yB.sub.(1?y)) .sub.aM.sub.b, [where M is at least one selected from the group consisting of C, S, P, Sn, Mo, Cu, and Nb, 0.73?x?0.85, 0.02 ?y?0.10, 13.0 ?a?19.0, and 0?b?2.0], in which a coercive force is 24 [A/m] or more (0.3 [Oe] or more) and 199 [A/m] or less (2.5 [Oe] or less), and a saturation magnetic flux density is 1.60 [T] or more and 2.20 [T] or less.

A method for manufacturing a wound magnetic core of a nanocrystalline soft magnetic alloy ribbon, the method including: a first heat treatment step of subjecting a wound magnetic core, which is formed by winding an amorphous soft magnetic alloy ribbon capable of nanocrystallization, to a heat treatment at a temperature that is 300? C. or higher and below a crystallization start temperature, with a first inner shape correction jig for holding the wound magnetic core in a non-circular shape placed in an internal space of the wound magnetic core; and a second heat treatment step of subjecting the wound magnetic core to a heat treatment for nanocrystallization at a temperature equal to or higher than the crystallization start temperature, with the first inner shape correction jig removed and with at least one second inner shape correction jig placed in the internal space of the wound magnetic core, wherein: a cross section of the second inner shape correction jig perpendicular to a direction in which the second inner shape correction jig extends is smaller than a cross section of the first inner shape correction jig perpendicular to a direction in which the first inner shape correction jig extends; and a magnetic field is applied to the wound magnetic core over a partial period of the second heat treatment step.

Disclosed herein is a magnetic base body including a plurality of soft magnetic metal particles each containing Fe, and a plurality of insulation films that cover respective surfaces of the soft magnetic metal particles. The plurality of soft magnetic metal particles include a first soft magnetic metal particle, the plurality of insulation films include a first insulation film that covers a surface of the first soft magnetic metal particle, and the first insulation film is disposed between the first soft magnetic metal particle and a soft second magnetic metal particle that is adjacent to the first soft magnetic metal particle, and the first insulation film includes a first oxide region that is composed of mainly an amorphous Al oxide and a second oxide region that covers a portion of the surface of the first soft magnetic metal particle and that is composed of mainly an oxide of an element A.

One aspect of the invention provides an Fe-based amorphous alloy ribbon having a free solidified surface and a roll contact surface, in which the Fe-based amorphous alloy ribbon has plural laser irradiation mark rows each formed from plural laser irradiation marks on at least one surface of the free solidified surface or the roll contact surface, a line interval is from 10 mm to 60 mm, which is a centerline interval in a middle section in a width direction, between mutually adjacent laser irradiation mark rows, a spot interval is from 0.10 mm to 0.50 mm, which is an interval between center points of the plural laser irradiation marks in each of the plural laser irradiation mark rows, and the number density D (=(1/d1)?(1/d2), d1: line interval, d2: spot interval) of the laser irradiation marks is from 0.05 marks/mm.sup.2 to 0.50 marks/mm.sup.2.

Disclosed are an amorphous nanocrystalline soft magnetic material, a preparation method therefor and an application thereof, an amorphous ribbon material, an amorphous nanocrystalline ribbon material, and an amorphous nanocrystalline magnetic sheet. The soft magnetic material comprises an amorphous matrix phase, a nanocrystalline phase distributed in the amorphous matrix phase, and fine crystalline particles distributed in the amorphous matrix phase and the nanocrystalline phase. The amorphous matrix phase comprises Fe, Si, and B, the fine crystalline particles comprise metal carbides, and the soft magnetic material comprises Fe, Si, B, P, and Cu.

The invention relates to the reduction of core losses in soft magnetic applications utilizing amorphous foil as the core material. Amorphous foil is known to have lower losses when compared to crystalline silicon steel laminations. It is found that a reduction of 10-40% of losses can be achieved over the current state of the art amorphous material by mechanical scribing of the surface of the soft magnetic laminations comprising the wound core in power conditioning devices such as a transformer. The scribing process introduces control of the magnetic domains causing ease of magnetic flux reversal

A multilayer block core includes a multilayer block in which nanocrystalline alloy ribbon pieces are layered, the nanocrystalline alloy ribbon pieces having a composition represented by the following Composition Formula (A).

Fe.sub.100-a-b-c-dB.sub.aSi.sub.bCu.sub.cM.sub.dComposition Formula (A)

In Composition Formula (A), each of a, b, c, and d is an atomic percent; the expressions 13.0a17.0, 3.5b5.0, 0.6c1.1, and 0d0.5 are satisfied; and M represents at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W.

A soft magnetic nanoparticle comprising an iron aluminide nanoalloy of the DO.sub.3 phase as a core encapsulated in an inert shell made of alumina.

The present invention achieves an object of continuously supplying a melt from a melt nozzle over a long period of time by adjusting the contents of Mn and S in an FeBSiC-type amorphous alloy ribbon. An amorphous alloy ribbon of the present invention includes a composition containing Fe, Si, B, C, Mn, S, and inevitable impurities, the composition containing, with respect to 100.0 atm % of the total amount of Fe, Si, B, and C, 3.0 atm % or more and 10.0 atm % or less of Si, 10.0 atm % or more and 15.0 atm % or less of B, and 0.2 atm % or more and 0.4 atm % or less of C, the amorphous alloy ribbon having a content ratio of Mn of more than 0.12 mass % and less than 0.15 mass %, and a content ratio of S of 0.0036 mass % or more and less than 0.0045 mass %, the amorphous alloy ribbon having a thickness of 10 m or more and 40 m or less, and a width of 100 mm or more and 300 mm or less.

A soft magnetic alloy according to an embodiment of the present invention has a composition of Formula below:

Fe.sub.aX.sub.bY.sub.cZ.sub.d [Formula] wherein, in the above Formula, X includes at least one of silicon (Si) and phosphorus (P), Y includes carbon (C), Z includes at least one of boron (B), nitrogen (N), aluminum (Al), titanium (Ti), zirconium (Zr), hafnium (Hf), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), cobalt (Co), and nickel (Ni), a ranges from 78 at % to 95.75 at %, b ranges from 2 at % to 16 at %, c ranges from 2 at % to 8 at %, and d ranges from 0.25 at % to 10 at %.