Magnetic bubble layer of thulium-containing garnet
US4433034A · kind A · utility
5Cited by
7References
5Claims
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Key dates
| Filing date | Apr 12, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Apr 12, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Certain Tm-containing iron garnet compositions provide layers having desirably low values of temperature coefficient of bubble collapse field and permit the fabrication of 1.2 .mu.m diameter magnetic bubble devices. The compositions, based on Tm-substitution on dodecahedral sites of [(La,Bi),(Sm,Eu),R].sub.3 (Fe,Al,Ga).sub.5 O.sub.12, are grown by liquid phase epitaxy onto suitable substrates. Bubble devices that incorporate the layers find applications in high density information storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.