Amorphous alloys for magnetic head core and video magnetic head using same
US4411716A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 13, 1981 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Jul 13, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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/noise ratio and shows little magnetic after effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.