Abstract: A soft magnetic powder including particles having a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b [provided that a, b, and x are each a number whose unit is at % and satisfy 0.3?a?2.0, 2.0?b?4.0, and 73.0?x?79.5, respectively, and y is a number satisfying f(x)?y?0.99, in which f(x)=(4×10?34)x17.56], wherein the particle contains a crystal grain having a grain diameter of 1.0 nm or more and 30.0 nm or less, and includes a Cu segregated portion in which Cu is segregated, the Cu segregated portion is present at a position deeper than 30 nm from a surface of the particle, and a maximum Cu concentration in the Cu segregated portion exceeds 6.0 at %.

Abstract: A soft magnetic powder has a composition represented by Fe100-a-b-c-d-e-f-g-hCuaSibBcMdM?eXfAlgTih (at %) (wherein M is at least one element selected from the group consisting of Nb and the like, M? is at least one element selected from the group consisting of V and the like, X is at least one element selected from the group consisting of C and the like, and a, b, c, d, e, f, g, and h satisfy the following formulae: 0.1?a?3, 0<b?30, 0<c?25, 5?b+c?30, 0.1?d?30, 0?e?10, 0?f?10, 0.002?g?0.032, and 0?h?0.038), wherein a crystalline structure having a particle diameter of 1 to 30 nm is contained in an amount of 40 vol % or more.

Abstract: An amorphous alloy soft magnetic powder has a composition represented by (FexCo1-x)100-(a+b)(SiyB1-y)aMb, 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.

Abstract: A soft magnetic powder contains a particle having a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b, and 0.3?a?2.0, 2.0?b?4.0, and 72.5?x?75.5, and y is a number satisfying f(x)?y?0.99, and f(x)=(4×10?34)×17.56. The particle includes a crystal grain having a grain size of 1.0 nm to 30.0 nm, a Cu segregation portion, and a crystal grain boundary. A content proportion of the crystal grain is 30% or more. When the Cu segregation portion positioned in a surface layer portion and having a grain size of 1.0 nm to 5.0 nm is referred to as a first Cu segregation portion, and the Cu segregation portion positioned in an inner portion and having a grain size of 3.0 nm to 10.0 nm is referred to as a second Cu segregation portion, a number proportion of the first Cu segregation portion is 80% or more, and a number proportion of the second Cu segregation portion is 80% or more.

Abstract: A soft magnetic powder contains a particle having a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b, and 0.3?a?2.0, 2.0?b?4.0, and 75.5?x?79.5, and y is a number satisfying f(x)?y?0.99, and f(x)=(4×10?34) x17.56. The particle includes a crystal grain having a grain size of 1 nm to 30 nm, a Cu segregation portion, and a crystal grain boundary. A content proportion of the crystal grain is 30% or more. When the Cu segregation portion positioned in a surface layer portion and having a grain size of 2 nm to 10 nm is referred to as a first Cu segregation portion, and the Cu segregation portion positioned in an inner portion and having a grain size of 2 nm to 7 nm is referred to as a second Cu segregation portion, a number proportion of the first Cu segregation portion is 80% or more, a number proportion of the second Cu segregation portion is 80% or more, and the number of the second Cu segregation portion is twice or more the number of the first Cu segregation portion.

Abstract: A soft magnetic powder containing a particle having a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b, a, b, and x being numbers whose units are atomic %, in which 0.3?a?2.0, 2.0?b?4.0, 75.5?x?79.5, and y is a number satisfying f(x)?y?0.99, and f(x)=(4×10?34)x17.56. The particle includes a crystal grain having a grain size of 1.0 nm or more and 30.0 nm or less and containing a Fe—Si crystal, a Cu segregation portion having a grain size of 2.0 nm or more and 16.0 nm or less in which Cu is segregated, and a crystal grain boundary adjacent to the crystal grain and having a Nb concentration and a B concentration higher than a Nb concentration and a B concentration in the crystal grain. A number proportion of the Cu segregation portion is 80% or more.

Abstract: A soft magnetic powder including particles having a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b [provided that a, b, and x are each a number whose unit is at % and satisfy 0.3?a?2.0, 2.0?b?4.0, and 73.0?x?79.5, respectively, and y is a number satisfying f(x)?y?0.99, in which f(x)=(4×10?34)x17.56], wherein the particle contains a crystal grain having a grain diameter of 1.0 nm or more and 30.0 nm or less, and includes a Cu segregated portion in which Cu is segregated, the Cu segregated portion is present at a position deeper than 30 nm from a surface of the particle, and a maximum Cu concentration in the Cu segregated portion exceeds 6.0 at %.

Abstract: A soft magnetic powder has a composition represented by Fe100-a-b-c-d-e-f-g-hCuaSibBcMdM?eXfAlgTih (at %) (wherein M is at least one element selected from the group consisting of Nb and the like, M? is at least one element selected from the group consisting of V and the like, X is at least one element selected from the group consisting of C and the like, and a, b, c, d, e, f, g, and h satisfy the following formulae: 0.1?a?3, 0<b?30, 0<c?25, 5?b+c?30, 0.1?d?30, 0?e?10, 0?f?10, 0.002?g?0.032, and 0?h?0.038), wherein a crystalline structure having a particle diameter of 1 to 30 nm is contained in an amount of 40 vol % or more.

Abstract: A soft magnetic powder has a composition represented by FexCuaNbb(Si1-yBy) 100-x-a-b-cCc [provided that a, b, c, and x are each a number whose unit is at %, and are numbers satisfying 0.3?a?2.0, 2.0?b?4.0, 0.1?c?4.0, and 72.0?x?79.3, and y is a number satisfying f(x)?y?0.99, in which f(x)=(4×1034)x17.56+0.07], and contains a crystalline structure having a particle diameter of 1.0 nm or more and 30.0 nm or less at 30 vol % or more.

Abstract: A soft magnetic powder has a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b [provided that a, b, and x each represent at % and are numbers satisfying 0.3?a?2.0, 2.0?b?4.0, and 73.0?x?79.5, respectively, and y is a number satisfying f(x)?y<0.99, in which f(x)=(4×10?34)x17.56], and contains a crystalline structure having a particle diameter of 1.0 nm or more and 30.0 nm or less at 30 vol % or more.

Abstract: A soft magnetic powder has a composition represented by Fe100a-b-c-d-e-f-g-hCuaSibBcMdM?eXfAlgTih (at %) (wherein M is at least one element selected from the group consisting of Nb and the like, M? is at least one element selected from the group consisting of V and the like, X is at least one element selected from the group consisting of C and the like, and a, b, c, d, e, f, g, and h satisfy the following formulae: 0.1?a?3, 0<b?30, 0<c?25, 5?b+c?30, 0.1?d?30, 0?e?10, 0?f?10, 0.002?g?0.032, and 0?h?0.038), wherein a crystalline structure having a particle diameter of 1 to 30 nm is contained in an amount of 40 vol % or more.