The present invention is an alloy that contains Fe, B, P, and Cu, and includes a non-crystalline phase and a plurality of crystalline phases formed in the non-crystalline, wherein an average Fe concentration in a whole alloy is 79 atomic % or greater, and wherein a density of Cu clusters when a region with a Cu concentration of 6.0 atomic % or greater among regions with 1.0 nm on a side in atom probe tomography is determined to be a Cu cluster is 0.20×10.sup.24/m.sup.3.

According to an aspect of the present disclosure, a composite material includes: a primary phase which is an alloy including a metallic element M and a nonmetallic element X and of which at least a portion is an amorphous phase; and a secondary phase which is dispersed in the primary phase and includes a ceramic compound including the metallic element M and the nonmetallic element X and represented by M.sub.aX.sub.b (wherein a and b are each greater than 0).

According to an aspect of the present disclosure, a composite material includes: a primary phase which is an alloy including a metallic element M and a nonmetallic element X and of which at least a portion is an amorphous phase; and a secondary phase which is dispersed in the primary phase and includes a ceramic compound including the metallic element M and the nonmetallic element X and represented by M.sub.aX.sub.b (wherein a and b are each greater than 0).

An alloy including an amorphous phase, and the alloy includes: an average Fe concentration in an entire alloy of 82.0 at. % or more and 88.0 at. % or less; an average Cu concentration in the entire alloy of 0.4 at. % or more and 1.0 at. % or less; an average P concentration in the entire alloy of 5.0 at. % or more and 9.0 at. % or less; an average B concentration in the entire alloy of 6.0 at. % or more and 10.0 at. % or less; an average Si concentration in the entire alloy of 0.4 at. % or more and 1.9 at. % or less; an average C concentration in the entire alloy of 0 at. % or more and 2.0 at. % or less; an average impurity concentration of an impurity other than Fe, Cu, P, B, Si, and C in the entire alloy of 0 at. % or more and 0.3 at. % or less; and a total of the average Fe concentration, the average Cu concentration, the average P concentration, the average B concentration, the average Si concentration, the average C concentration, and the average impurity concentration of 100.0 at. %.

An alloy including an amorphous phase, and the alloy includes: an average Fe concentration in an entire alloy of 82.0 at. % or more and 88.0 at. % or less; an average Cu concentration in the entire alloy of 0.4 at. % or more and 1.0 at. % or less; an average P concentration in the entire alloy of 5.0 at. % or more and 9.0 at. % or less; an average B concentration in the entire alloy of 6.0 at. % or more and 10.0 at. % or less; an average Si concentration in the entire alloy of 0.4 at. % or more and 1.9 at. % or less; an average C concentration in the entire alloy of 0 at. % or more and 2.0 at. % or less; an average impurity concentration of an impurity other than Fe, Cu, P, B, Si, and C in the entire alloy of 0 at. % or more and 0.3 at. % or less; and a total of the average Fe concentration, the average Cu concentration, the average P concentration, the average B concentration, the average Si concentration, the average C concentration, and the average impurity concentration of 100.0 at. %.

An amorphous alloy soft magnetic powder has a composition represented by (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, and x, y, a, and b satisfy 0.73≤x≤0.85, 0.02≤y≤0.10, 13.0≤a≤19.0, and 0≤b≤2.0. A Si—K absorption edge XANES spectrum obtained when performing an XAFS measurement on particles has a peak A present in a range of 1842±1 eV, a peak B present in a range of 1845±1 eV, and a peak C present in a range of 1848±1 eV. An intensity ratio A/C is 0.40 or less, and an intensity ratio B/C is 0.60 or less.

An amorphous alloy soft magnetic powder has a composition represented by (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, and x, y, a, and b satisfy 0.73≤x≤0.85, 0.02≤y≤0.10, 13.0≤a≤19.0, and 0≤b≤2.0. A Si—K absorption edge XANES spectrum obtained when performing an XAFS measurement on particles has a peak A present in a range of 1842±1 eV, a peak B present in a range of 1845±1 eV, and a peak C present in a range of 1848±1 eV. An intensity ratio A/C is 0.40 or less, and an intensity ratio B/C is 0.60 or less.

There is provided a method for manufacturing an alloy ribbon that suppresses different magnetic properties at each position of the alloy ribbon obtained by crystallizing an amorphous alloy ribbon. The method for manufacturing an alloy ribbon includes: heating a laminated body in which positions of thick portions of a plurality of amorphous alloy ribbons are shifted to a first temperature range less than a crystallization starting temperature; and heating an end portion in a lamination direction of the laminated body to a second temperature range equal to or more than the crystallization starting temperature after the heating the laminated body. An ambient temperature is held after heating the laminated body such that the laminated body is maintained within a temperature range in which the laminated body can be crystallized by heating the end portion to the second temperature range.

A coated soft magnetic alloy particle includes a soft magnetic alloy particle containing an amorphous phase, and a first film containing at least one compound selected from the group consisting of an inorganic compound having a hexagonal, trigonal, or monoclinic crystal structure and a layered silicate mineral. The first film coats a surface of the soft magnetic alloy particle, and an outer peripheral contour of a section of the coated soft magnetic alloy particle has an average smoothness ζ_ave of 0.92 or more and 1.00 or less (i.e., from 0.92 or more and 1.00).

A coated soft magnetic alloy particle includes a soft magnetic alloy particle containing an amorphous phase, and a first film containing at least one compound selected from the group consisting of an inorganic compound having a hexagonal, trigonal, or monoclinic crystal structure and a layered silicate mineral. The first film coats a surface of the soft magnetic alloy particle, and an outer peripheral contour of a section of the coated soft magnetic alloy particle has an average smoothness ζ_ave of 0.92 or more and 1.00 or less (i.e., from 0.92 or more and 1.00).