The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2009
Filed:
Jul. 21, 2006
Xiaochun Zhu, Pittsburgh, PA (US);
Jian-gang Zhu, Pittsburgh, PA (US);
Xiaochun Zhu, Pittsburgh, PA (US);
Jian-Gang Zhu, Pittsburgh, PA (US);
Carnegie Melon University, Pittsburgh, PA (US);
Abstract
A perpendicular spin-torque-driven magnetic oscillator is disclosed. According to various embodiments, the magnetic oscillator comprises a magnetic reference stack, a magnetic oscillating stack, and an interlayer between the reference stack and the oscillating stack such that the reference stack and the oscillating stack are exchange coupled. The reference stack may have sufficient perpendicular anisotropy such that it causes, via the spin momentum transfer effect, the spin polarization of the conducting electrons in the oscillating stack to produce a spin torque on the local magnetization of the oscillating layer. As such, the oscillating stack may produce a sustained gyromagnetic oscillation around the perpendicular axis of the oscillating stack when (i) the oscillating stack and the reference stack have opposite magnetizations and (ii) there is a direct current flowing in the magnetic oscillator from the oscillating stack to the reference stack. Also, the oscillating stack may produce a sustained gyromagnetic oscillation when (i) the oscillating stack and the reference stack are magnetized in the same direction and (ii) there is a direct current flowing in the magnetic oscillator from the reference stack to the oscillating stack.