Modified field generation layer for microwave assisted magnetic recording
US8208219B2 · kind B2 · utility
39Cited by
4References
19Claims
0Family size
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Key dates
| Filing date | Nov 5, 2010 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Jan 12, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spin torque oscillator is described in which the conventional Field Generation Layer (FGL) is replaced by a bilayer, one of whose members exhibits perpendicular magnetic anisotropy while the other exhibits conventional in-plane anisotropy. Provided the layer with the perpendicular anisotropy is the one that is closest to the spacer layer, the device is able to generate microwaves at current densities as low as 1×108 A/cm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.