High-frequency permeability characteristics of Fe- and Co-based amorphous alloys with high B concentrations

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

DOI:https://doi.org/10.1109/20.800522· OSTI ID:20000771

Inoue, A; Itoi, T; Koshiba, H; Makino, A

New Fe-based and Co-based amorphous alloys with a high B concentration of 30at% were formed in (Fe, Co, Ni){sub 62}Nb{sub 8}B{sub 30} system. The amorphous alloys exhibit a wide supercooled liquid region ({Delta}T{sub x}) above 80K before crystallization in the range of 5 to 40% Co and 0 to 10%Ni and the largest {Delta}T{sub x} is 87K for Fe{sub 52}Co{sub 10}Nb{sub 8}B{sub 30}. The Fe{sub 62{minus}x}Co{sub x}Nb{sub 8}B{sub 30} alloys exhibit good soft magnetic properties, i.e., low coercive force (H{sub c}) of 2--3 A/m, high effective permeability ({mu}{sub e}) of 20,000--30,000 at 1 kHz and low saturated magnetostriction ({lambda}{sub s}) of 2--8 x 10{sup {minus}6}. The high {mu}{sub c} characteristics are maintained in a higher frequency range and the highest {mu}{sub c} at 1 kHz is 7500 for Co{sub 40}Fe{sub 22}Nb{sub 8}B{sub 30} amorphous alloys exhibiting large {Delta}T{sub x}, good high-frequency permeability and high resistivity is encouraging the future development as a new soft magnetic materials.

• Research Organization: Tohoku Univ., Sendai (JP)
• OSTI ID: 20000771
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers) Journal Issue: 5Pt2 Vol. 35; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMORPHOUS STATE
BORON ALLOYS
COBALT BASE ALLOYS
ELECTRICAL PROPERTIES
IRON BASE ALLOYS
MAGNETIC PROPERTIES
NICKEL ALLOYS
NIOBIUM ALLOYS