Bias-Field-Free Microwave Oscillator Driven by Perpendicularly Polarized Spin Current

In this paper, we propose a novel design of spin-torque-driven microwave oscillator that is free of bias magnetic field. The oscillator consists of a perpendicularly magnetized spin-polarization layer and an oscillating bilayer. The oscillating bilayer comprises a spin-torque-driven layer and a magn...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2006-10, Vol.42 (10), p.2670-2672
Main Authors: Zhu, X., Zhu, J.-G.
Format: Article
Language:English
Subjects:
Anisotropic magnetoresistance
Couplings
Cross-disciplinary physics: materials science
rheology
Current density
Design engineering
Exact sciences and technology
Frequency
Joining
Magnetic analysis
Magnetic fields
Magnetism
Magnetization
Materials science
Micromagnetic modeling
Micromagnetics
microwave
Microwave oscillators
Oscillating
Oscillations
oscillator
Oscillators
Other topics in materials science
perpendicular magnetic tunnel junction (MTJ)
Physics
Polarization
spin torque
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we propose a novel design of spin-torque-driven microwave oscillator that is free of bias magnetic field. The oscillator consists of a perpendicularly magnetized spin-polarization layer and an oscillating bilayer. The oscillating bilayer comprises a spin-torque-driven layer and a magnetic layer of perpendicular anisotropy with adequate interlayer-exchange coupling. The perpendicularly spin-polarized current can yield a sustained stable magnetization oscillation in the oscillating bilayer around the perpendicular easy axis. The oscillating frequency can be tuned from zero to tens of gigahertz by varying the inject current density. The underlying physical mechanism of the oscillation is discussed, and a micromagnetic analysis on the characteristics of the oscillator is reported
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.879722