Amorphous alloys for magnetic head core and video magnetic head

Details Amorphous alloys for magnetic head core and video magnetic head Amorphous alloys for magnetic head core and video magnetic head

1981-07-13

1983-10-25

Sheehan, John P.

Metal treatment

Stock

Amorphous, i.e., glassy

148 3155, 360125, C22C 3300

Patent

active

044117167

ABSTRACT:
Amorphous alloys for magnetic head cores of a composition which is expressed by a general formula (Co.sub.x Fe.sub.1-x).sub.a Cr.sub.b Si.sub.c B.sub.1-a-b-c wherein the value of x is in the range between 0.925 and 0.97, the value of a is in the range between 0.74 and 0.76, the value of b is in the range between 0.005 and 0.03 and the value of c is in the range between 0.06 and 0.18, and wherein a+b+c.ltoreq.0.94, and a magnetic head for video equipment wherein at least one foil of one of the aforesaid alloys having a width of below 30 .mu.m is used. The amorphous alloys of the aforesaid composition are high in permeability, high in saturation magnetic flux density and low in magnetostriction. A magnetic head for video equipment using such alloys has excellent characteristics in that it has high recording and reproducing characteristics and a high output
oise ratio and shows little magnetic after effect.

REFERENCES:
patent: 4079430 (1978-03-01), Fujishima et al.
patent: 4179719 (1979-12-01), Imamura et al.
patent: 4231816 (1980-11-01), Cuomo et al.

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