Abstract: A magnetic alloy having a composition represented by the general formula of Fe100-x-yCuxBy (atomic %), wherein x and y are numbers meeting the conditions of 0.1?x?3, and 10?y?20, or the general formula of Fe100-x-y-zCuxByXz (atomic %), wherein X is at least one element selected from the group consisting of Si, S, C, P, Al, Ge, Ga and Be, and x, y and z are numbers meeting the conditions of 0.1?x?3, 10?y?20, 0?z?10, and 10<y+z?24), the magnetic alloy having a structure containing crystal grains having an average diameter of 60 nm or less in an amorphous matrix, and a saturation magnetic flux density of 1.7 T or more.

Abstract: This invention provides an amorphous transformer for electric power supply, using a magnetic core formed of an amorphous alloy material, which, as compared with the conventional amorphous alloy material, has a lower annealing temperature and a higher level of magnetic properties. The amorphous transformer for electric power supply is provided with a magnetic core of a thin band of an amorphous alloy and a winding wire. The iron core has been annealed under such conditions that the iron core center part temperature during annealing after iron core molding is 300 to 340° C. and the holding time is not less than 0.5 hr. Further, for the iron core, the magnetic field intensity during annealing after the iron core molding is not less than 800 A/m.

Abstract: A magnetic core for a current transformer, and a current transformer and a watt hour meter used thereof, which is preferred the detection of a alternate current with a large asymmetrical waveform and a alternate current which a direct current is superimposed are realized. A magnetic core for a current transformer comprising the composition represented by the general formula: Fe100-x-a-y-cMxCuaM?yX?c (atomic %), wherein M is at least one element selected from Co and Ni, M? is at least one element selected from V, Ti, Zr, Nb, Mo, Hf, Ta, X? is at least one element selected from Si and B, and x, a, y, and c meets the composition of 3?x?50, 0.1?a?3, 1?y?10, 2?c?30, and also 7?y+c?30, and an alloy comprising a crystal grain consisting of at least a part or all of the composition with a mean particle size of less than or equal to 50 nm.

Abstract: A magnetic core making use of an Fe-based amorphous alloy ribbon that simultaneously attains miniaturization and noise reduction through realization of high Bs; and an applied product making use of the same. There is provided a magnetic core making use of an Fe-based amorphous alloy ribbon, wherein the saturated magnetic flux density (Bs) of the Fe-based amorphous alloy ribbon is ?1.60 T and wherein the ratio between magnetic flux density at a core external magnetic field of 80 A/m (B80) and Bs of the Fe-based amorphous alloy ribbon, B80/Bs, is ?0.90.

Abstract: Even if produced from a broad amorphous alloy ribbon, a nano crystal soft magnetic alloy, a magnetic core made of a nano crystal soft magnetic alloy, and the amorphous alloy ribbon for a nano crystal soft magnetic alloys which has the excellent alternate magnetic property, the small dispersion, the excellent temporal stability in high temperature, the excellent mass productivity can be provided. An amorphous alloy ribbon, wherein the alloy composition is represented by Fe100-a-b-c-dMaSibBcCd (atomic %), 0<a?10, 0?b?20, 2?c?20, 0<d?2, 9?a+b+c+d?35, and an amorphous alloy ribbon consists of inevitable impurities, and said M is at least one element selected from Ti, V, Zr, Nb, Mo, Hf, Ta, and W, and C concentration takes maximum value at 2-20 nm depth from the surface of said amorphous alloy with equivalent SiO2.

Abstract: A current transformer core made of an alloy having a composition represented by the general formula: Fe100-x-a-y-cMxCuaM?yX?c (by atomic %), wherein M is Co and/or Ni, M? is at least one element selected from the group consisting of V, Ti, Zr, Nb, Mo, Hf, Ta and W, X? is Si and/or B, and x, a, y and c are numbers satisfying 10?x?50, 0.1?a?3, 1?y?10, 2?c?30, and 7?y+c?31, respectively; at least part or all of the alloy structure being composed of crystal grains having an average particle size of 50 nm or less.

Abstract: An Fe-based amorphous alloy ribbon having a composition comprising FeaSibBcCd and inevitable impurities, wherein a is 80 to 83 atomic %, b is 0.1 to 5 atomic %, c is 14 to 18 atomic %, and d is 0.01 to 3 atomic %, the concentration distribution of C measured radially from both surfaces to the inside of said Fe-based amorphous alloy ribbon having a peak within a depth of 2 to 20 nm.

Abstract: A current transformer core made of an alloy having a composition represented by the general formula: Fe100-x-a-y-cMxCuaM?yX?c (by atomic %), wherein M is Co and/or Ni, M? is at least one element selected from the group consisting of V, Ti, Zr, Nb, Mo, Hf, Ta and W, X? is Si and/or B, and x, a, y and c are numbers satisfying 10?x?50, 0.1?a?3, 1?y?10, 2?c?30, and 7?y+c?31, respectively; at least part or all of the alloy structure being composed of crystal grains having an average particle size of 50 nm or less.

Abstract: A low core loss magnetic alloy with a high saturation magnetic flux density, which has a composition represented by the general formula: (Fel-aCoa)100-y-cM?yX?c(atomic %) where M? represents at least one element selected from V, Ti, Zr, Nb, Mo, Hf, Ta, and W, X? represents Si and B, an Si content (atomic %) is smaller than a B content (atomic %), the B content is from 4 to 12 atomic %, and the Si content is from 0.01 to 5 atomic %, a, y, and c satisfy respectively 0.2<a<0.6, 6.5?y?15, 2?c?15, and 7?(y+c)?20, at least a part of an alloy structure being occupied by crystal grains having grain size of not larger than 50 nm, a saturation magnetic flux density Bs being not less than 1.65 T, and a core loss Pcm per unit volume in conditions at 80° C., f=20 kHz, and Bm=0.2 T being not more than 15 W/kg.

Abstract: An iron-based amorphous alloy and magnetic core with an iron-based amorphous alloy having a chemical composition with a formula FeaBbSicCd, where 81<a?84, 10?b?18, 0<c?5 and 0<d<1.5, numbers being in atomic percent, with incidental impurities, simultaneously have a value of a saturation magnetic induction exceeding 1.6 tesla, a Curie temperature of at least 300° C. and a crystallization temperature of at least 400° C. When cast in a ribbon form, such an amorphous metal alloy is ductile and thermally stable, and is suitable for various electric devices because of high magnetic stability at such devices' operating temperatures.

Abstract: An iron-based amorphous alloy and magnetic core with an iron-based amorphous alloy having a chemical composition with a formula FeaBbSicCd, where 80<a?84, 8?b?18, 0<c?5 and 0<d?3, numbers being in atomic percent, with incidental impurities, simultaneously having a value of a saturation magnetic induction exceeding 1.6 tesla, a Curie temperature of at least 300° C. and a crystallization temperature of at least 350 ° C. When cast in a ribbon form, such an amorphous metal alloy is ductile and thermally stable, and is suitable for various electric devices because of high magnetic stability at such devices' operating temperatures.

Abstract: A low core loss magnetic alloy with a high saturation magnetic flux density, which has a composition represented by the general formula: (Fe1-aCoa)100-y-cM?yX?c(atomic %) where M? represents at least one element selected from V, Ti, Zr, Nb, Mo, Hf, Ta, and W, X? represents Si and B, an Si content (atomic %) is smaller than a B content (atomic %), the B content is from 4 to 12 atomic %, and the Si content is from 0.01 to 5 atomic %, a, y, and c satisfy respectively 0.2<a<0.6, 6.5?y?15, 2?c?15, and 7?(y+c)?20, at least a part of an alloy structure being occupied by crystal grains having grain size of not larger than 50 nm, a saturation magnetic flux density Bs being not less than 1.65 T, and a core loss Pcm per unit volume in conditions at 80° C., f=20 kHz, and Bm=0.2 T being not more than 15 W/kg.

Abstract: A magnetic core provided with a shape for a transformer by a cut-lap or step-lap method, which is constituted by an Fe-based amorphous alloy ribbon having excellent magnetic characteristics, which is represented by the general formula: FeaSibBcMx or FeaSibBcCdMx wherein M is Cr and/or Ni, a is 78 to 86 atomic %, b is 0.001 to 5 atomic %, c is 7 to 20 atomic %, x is 0.01 to 5 atomic %, and d is 0.001 to 4 atomic %, (a+b+c+x) or (a+b+c+d+x) being 100.

Abstract: An Fe-based amorphous alloy ribbon having a composition comprising FeaSibBcCd and inevitable impurities, wherein a is 76 to 83.5 atomic %, b is 12 atomic % or less, c is 8 to 18 atomic %, and d is 0.01 to 3 atomic %, the 5 concentration distribution of C measured radially from both surfaces to the inside of said Fe-based amorphous alloy ribbon having a peak within a depth of 2 to 20 nm.

Abstract: A ferrite core for use in coupling transformers and distributing transformers in CATV equipments such as couplers, distributors and amplifiers, the ferrite core being made of a ferrite having a saturation magnetostriction |&lgr;s| of 8×10−6 or less in an absolute value and an initial permeability &mgr;i of 300 or more.

Abstract: Disclosed is a Co-base magnetic alloy excellent in high-frequency magnetic properties, of which chemical composition is represented by the following general formula, by atomic %, (Co1-aFea)100-y-cM′yX′c, where M′ is at least one element selected from the group consisting of V, Ti, Zr, Nb, Mo, Hf, Sc, Ta and W; X′ is at least one element selected from the group consisting of Si and B; and a, y and c are defined by the formulas of a<0.35, 1.5≦y≦15, and 4≦c≦30, respectively. At least a part of the alloy structure of the alloy consists of crystal grains having an average grain size of not more than 50 nm. The alloy has a relative initial permeability of not more than 2000.

Abstract: Disclosed is a Co-base magnetic alloy excellent in high-frequency magnetic properties, of which chemical composition is represented by the following general formula, by atomic %, (Co1-aFea)100-y-cM′yX′c, where M′ is at least one element selected from the group consisting of V, Ti, Zr, Nb, Mo, Hf, Sc, Ta and W; X′ is at least one element selected from the group consisting of Si and B; and a, y and c are defined by the formulas of a<0.35, 1.5≦y≦15, and 4≦c≦30, respectively. At least a part of the alloy structure of the alloy consists of crystal grains having an average grain size of not more than 50 nm. The alloy has a relative initial permeability of not more than 2000.

Abstract: A soft magnetic alloy strip is manufactured by a single roll method. The soft magnetic alloy strip is 0.2×d mm or less (, which “d” is a width of the strip,) in warpage in the widthwise direction of the strip, and has a continuous, long length not less than 50 m, in which a width of an air pockets occurring on a roll contact face is not more than 35 &mgr;m, a length of the air pockets is not more than 150 &mgr;m, and the centerline average roughness Ra of the roll contact face is not more than 0.5 &mgr;m.

Abstract: A miniaturized transformer including (a) a planer or rod-shaped magnetic core having a height of 3 mm or less and constituted by a laminate of thin ribbons each having a thickness of 30 .mu.m or less, each thin ribbon being made of a nanocrystalline soft magnetic alloy having a structure at least partly occupied by crystal grains having an average crystal grain size of 100 nm or less, or an amorphous soft magnetic alloy, (b) at least one primary winding provided around the magnetic core, and (c) at least one secondary winding provided around the magnetic core.

Abstract: A nanocrystalline alloy wherein at least 50 volume % of an alloy structure consists of a crystal grain mainly comprising bcc-phase having a grain size of 50 nm or less, a saturation magnetic flux density of the alloy is 1 T or more, a remanent flux density of the alloy is 0.4 T or less, and an Fe--B compound phase is partially formed in the alloy. The nanocrystalline alloy produced by heat treatment without applying any magnetic field shows pulse attenuation characteristics comparable to or more excellent than those of a nanocrystalline alloy obtained by heat treatment in a magnetic field.