Soft magnetic alloy ribbon and magnetic core
A soft magnetic alloy ribbon is made of a Fe-based soft magnetic alloy and includes a first laser peening trace row and a second laser peening trace row each of which includes a plurality of laser peening traces in a row in a first direction and which are arranged adjacent to each other in a second direction intersecting the first direction, and a domain wall extending in a third direction, in which D0<D1 where a straight line at an equal separation distance from the first laser peening trace row and the second laser peening trace row is defined as a central line, a straight line which has a first distance where a distance from the first laser peening trace row is shorter than the separation distance is defined as a first reference line, a width of the domain wall at a position intersecting the central line is defined as D0, and a width of the domain wall at a position intersecting the first reference line is defined as D1.
1 . A soft magnetic alloy ribbon made of a Fe-based soft magnetic alloy, the soft magnetic alloy ribbon comprising:
a first laser peening trace row and a second laser peening trace row each of which includes a plurality of laser peening traces in a row in a first direction and which are arranged adjacent to each other in a second direction intersecting the first direction; and
a domain wall extending in a third direction intersecting the first direction, wherein
D0<D1
where a straight line at an equal separation distance from the first laser peening trace row and the second laser peening trace row is defined as a central line,
a straight line which is located on a central line side of the first laser peening trace row and has a first distance where a distance from the first laser peening trace row is shorter than the separation distance is defined as a first reference line,
a width of the domain wall at a position intersecting the central line is defined as D0,
a width of the domain wall at a position intersecting the first reference line is defined as D1,
a width of the soft magnetic alloy ribbon is 5 mm or more and 500 mm or less,
a thickness of the soft magnetic alloy ribbon is 1 μm or more and 40 μm or less,
the Fe-based soft magnetic alloy is an Fe—SI—B alloy or an Fe—Si—B—C alloy,
the Fe-based soft magnetic alloy contains at least one of an amorphous structure and a nanocrystalline structure in a total of 50 volume % or more,
the spot spacing between the laser peening traces is 1.0 mm or less,
the spot diameter of the laser peening traces is 0.010 mm or more and 0.30 mm or less, and
the spot depth of the laser peening traces is 0.0020 mm or more and 0.15 mm or less.
2 . The soft magnetic alloy ribbon according to claim 1 , wherein
D0<D2
where a straight line which is located on the central line side of the second laser peening trace row and has a second distance where a distance from the second laser peening trace row is shorter than the separation distance is defined as a second reference line, and
a width of the domain wall at a position intersecting the second reference line is defined as D2.
3 . The soft magnetic alloy ribbon according to claim 1 , wherein
the second direction and the third direction are parallel to each other.
4 . The soft magnetic alloy ribbon according to claim 1 , wherein
a spacing between the first laser peening trace row and the second laser peening trace row is 1 mm or more and 40 mm or less.
5 . The soft magnetic alloy ribbon according to claim 1 , wherein
an iron loss under conditions of a frequency of 50 Hz and a magnetic flux density of 1.2 T is 0.05 W/kg or less.
6 . A magnetic core, comprising:
the soft magnetic alloy ribbon according to claim 1 .