Spin-torque oscillator (STO) with magnetically damped free layer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 11, 2013
Grant Date -
Jan 10, 2013
app pub date -
Jul 5, 2011
filing date -
Jul 5, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A spin-torque oscillator (STO) has increased magnetic damping of the oscillating free ferromagnetic layer. The Gilbert magnetic damping parameter (α) is at least 0.05, and preferably greater than 0.05. The free layer may be a any type of conventional ferromagnetic material, but contains one or more damping elements as a dopant. The damping element is selected from the group consisting of Pt, Pd and the 15 lanthanide elements. The free layer damping may also be increased by a damping layer adjacent the free layer. One type of damping layer may be an antiferromagnetic material, like a Mn alloy. As a modification to the antiferromagnetic damping layer, a bilayer damping layer may be formed of the antiferromagnetic layer and a nonmagnetic metal electrically conductive separation layer between the free layer and the antiferromagnetic layer. Another type of damping layer may be one formed of one or more of the elements selected from Pt, Pd and the lanthanides.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2011 Application Filing Year
- G11B Class
- 1978 Applications Filed
- 1619 Patents Issued To-Date
- 81.86 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 78 Citation Count
- G11B Class
- 99.17 % this patent is cited more than
- 12 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 11, 2024 |
