Thermally stable magnetic film which resists hard bubbles
US4352862A · kind A · utility
0Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1980 |
| Grant date | Oct 5, 1982 |
| Priority date | — |
| Expiry date | Nov 10, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a crystalline magnetic film having at least two rare-earth elements symmetrically disposed at lattice sites in the film's interior to there produce a magnetic moment perpendicular to the film's surface; and having those same rare-earth elements less symmetrically disposed at lattice sites in a region at the film's surface, to there produce a magnetic moment parallel to the surface. This in-plane magnetic moment resists hard bubbles from forming in the film; and it is stable at temperatures over 500.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.