Photo-inducible magnetic exchange coupling device
US5723978A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1995 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Feb 23, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F10/3254
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic device, comprises a first magnetic layer; a second magnetic layer on the magnetic layer and having a coercive force smaller than that of the first magnetic layer; a semiconductor layer between the first and second magnetic layers so that photo-induced magnetism occurs between the first and second magnetic layers when the semiconductor layer is irradiated with light, a third magnetic layer on the second magnetic layer, the third magnetic layer having a coercive force larger than the coercive force of the second magnetic layer, and a second semiconductor layer between the second and third magnetic layers, magnetism being induced between the second and third magnetic layers when the second semiconductor layer is irradiated with light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.