Spin-valve or tunnel-junction radio-frequency oscillator, process for adjusting the frequency of such an oscillator and network consisting of a plurality of such oscillators
US8542072B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2011 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Dec 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N50/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio-frequency oscillator incorporates a magnetoresistive device within which an electron current is able to flow. The device includes a stack including: a magnetic trapped layer, the magnetization of which is of substantially fixed direction; a magnetic free layer; and a non-magnetic intermediate layer-interposed between the free layer and the trapped layer. The oscillator also includes a mechanism capable of making an electron current flow in the layers constituting the stack and in a direction perpendicular to the plane which contains the layers. At least the free layer is devoid of any material at its center. The electron current density flowing through the stack is capable of generating a magnetization in the free layer in a micromagnetic configuration in the shape of a skewed vortex flowing in the free layer around the center of the free layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.