Magnetic oscillations driven by the spin hall effect in 3-terminal magnetic tunnel junction devices
Journal
Physical Review Letters
Journal Volume
109
Journal Issue
18
Date Issued
2012
Author(s)
Abstract
We show that a direct current in a tantalum microstrip can induce steady-state magnetic oscillations in an adjacent nanomagnet through spin torque from the spin Hall effect (SHE). The oscillations are detected electrically via a magnetic tunnel junction (MTJ) contacting the nanomagnet. The oscillation frequency can be controlled using the MTJ bias to tune the magnetic anisotropy. In this 3-terminal device, the SHE torque and the MTJ bias therefore provide independent controls of the oscillation amplitude and frequency, enabling new approaches for developing tunable spin torque nano-oscillators.
SDGs
Type
journal article