Method and system for providing magnetic junctions having a thermally stable and easy to switch magnetic free layer
US9029965B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2013 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Nov 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N50/01
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system provide a magnetic junction usable in a magnetic device. The magnetic junction includes a pinned layer, a nonmagnetic spacer layer, and a free layer. The nonmagnetic spacer layer is between the pinned layer and the free layer. The free layer includes a plurality of subregions. Each of the subregions has a magnetic thermal stability constant. The subregions are ferromagnetically coupled such that the free layer has a total magnetic thermal stability constant. The magnetic thermal stability constant is such that the each of the subregions is magnetically thermally unstable at an operating temperature. The total magnetic thermal stability constant is such that the free layer is magnetically thermally stable at the operating temperature. The magnetic junction is configured such that the free layer is switchable between a plurality of stable magnetic states when a write current is passed through the magnetic junction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.