Method of achieving a flat magnetization loop in amorphous cores

Details Method of achieving a flat magnetization loop in amorphous cores Method of achieving a flat magnetization loop in amorphous cores

1987-03-16

1989-03-14

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148305, H01F 100

Patent

active

048121819

ABSTRACT:
A method for achieving a flat magnetization loop in cores, such as for use in inductive components, which are wound of amorphous ribbon includes the steps of subjecting the wound core to long-term heat treatment of more than 10 hours, and selecting the temperature during the heat treatment so low that less than half of the ribbon cross-section exhibits crystalline precipitations which occur during the heat treatment.

REFERENCES:
patent: 4226619 (1980-10-01), Hatta et al.
patent: 4311539 (1982-01-01), Uedaira et al.
"Magnetic Properties and Relaxation Processes of Magnetic Anisotropy in Amorphous Magnetic Ribbons Due to Heat Treatment," Imamura et al, IEEE Trans. on Mag., vol. MAG-17 No. 6 (Nov. 1981).
"Development of Amorphous Fe-B Based Alloys For Chock And Inductor Applications," Major et al, IEEE Trans. on Magnetics, vol. Mag-20, No. 5, Sep. 1984, pp. 1415-1416.
"Origin of the Perpendicular Anisotropy in Amorphous Fe.sub.82 B.sub.12 Si.sub.6 Ribbons," Ok et al, Physical Review, vol. 23, No. 5, pp. 2257-2261, Mar. 1981.

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