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  • Title: Magnetic oscillations driven by the spin Hall effect in 3-terminal magnetic tunnel junction devices.
    Author: Liu L, Pai CF, Ralph DC, Buhrman RA.
    Journal: Phys Rev Lett; 2012 Nov 02; 109(18):186602. PubMed ID: 23215306.
    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.
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