Patent ID: 8021498
Filing Date: 2011-09-20
Classification: H01F

Abstract:
1. A magnetic core made of an Fe-based amorphous alloy ribbon, wherein the Fe-based amorphous alloy ribbon has a saturated magnetic flux density B s being not lower than 1.60 T, and a ratio B 80 /B s being not less than 0.90, which is the ratio of a magnetic flux density B 80 generated when an external magnetic field of 80 A/m is applied to the magnetic core in relation to the saturated magnetic flux density B s of the Fe-based amorphous alloy ribbon, wherein the Fe-based amorphous alloy ribbon has a composition that is expressed by a formula T wherein the Fe-based amorphous alloy ribbon has a carbon segregation layer having a peak position in a range between 2 nm and 20 nm deep from a ribbon surface.