MAGNETIC RIBBON AND MAGNETIC CORE USING SAME
A magnetic ribbon according to an embodiment has a crystallinity degree of 0.05 or higher and 0.4 or lower when the magnetic ribbon is subjected to XRD analysis, the magnetic ribbon being Fe—Nb—Cu—Si—B-base, and the crystallinity degree being expressed by “a peak total area of a crystalline phase”/(“a peak area of an amorphous phase”+“the peak total area of the crystalline phase”). Also, the magnetic ribbon is preferred to have a region in which a KIKUCHI pattern is detected when the crystalline phase is subjected to EBSD analysis. Also, the thickness of the magnetic ribbon is preferred to be 25 μm or less.
1 . A magnetic ribbon having a crystallinity degree of 0.05 or higher and 0.4 or lower when the magnetic ribbon is subjected to XRD analysis, the magnetic ribbon being Fe—Nb—Cu—Si—B-base, and the crystallinity degree being expressed by “a peak total area of a crystalline phase”/(“a peak area of an amorphous phase”+“the peak total area of the crystalline phase”).
2 . The magnetic ribbon according to claim 1 having a region in which a KIKUCHI pattern is detected when the crystalline phase is subjected to EBSD analysis.
3 . The magnetic ribbon according to claim 1 , wherein the magnetic ribbon has a sheet thickness of 25 μm or lower.
4 . A magnetic core comprising the magnetic ribbon according to claim 1 wound or stacked.
5 . The magnetic core comprising a crystalline structure having an average crystal grain size of 200 nm or lower obtained by subjecting the magnetic core according to claim 4 to heat treatment.
6 . The magnetic core according to claim 4 having a value of a crystallinity degree of 0.9 or higher when the magnetic core is subjected to XRD analysis.
7 . The magnetic core according to claim 4 comprising a wound coil.
8 . The magnetic core according to claim 4 having L 10 /L 100 of 1.5 or lower and a magnetic permeability at 100 kHz of 15000 or higher, wherein inductance at 10 kHz is L 10 , and inductance at 100 kHz is L 100 .
9 . The magnetic core according to claim 4 having L 100 /L 1M of 11 or lower and a magnetic permeability at 100 kHz of 15000 or higher, wherein inductance at 100 kHz is L 100 , and inductance at 1 MHz is Lim.
10 . A magnetic core comprising the magnetic ribbon according to claim 3 wound or stacked, wherein
the magnetic core
comprises a crystalline structure having an average crystal grain size of 200 nm or lower obtained by subjecting the magnetic core to heat treatment,
has a value of a crystallinity degree of 0.9 or higher when the magnetic core is subjected to XRD analysis, and
has L 10 /L 100 of 1.5 or lower and a magnetic permeability at 100 kHz of 15000 or higher, wherein inductance at 10 kHz is L 10 , and inductance at 100 kHz is L 100 .
11 . A magnetic core comprising the magnetic ribbon according to claim 3 wound or stacked, wherein
the magnetic core
comprises a crystalline structure having an average crystal grain size of 200 nm or lower obtained by subjecting the magnetic core to heat treatment,
has a value of a crystallinity degree of 0.9 or higher when the magnetic core is subjected to XRD analysis, and
has L 100 /L 1M of 11 or lower and a magnetic permeability at 100 kHz of 15000 or higher, wherein inductance at 100 kH is Lim, and inductance at 1 MHz is L 1M .