Spin-torque ferromagnetic resonance induced by the spin Hall effect.

نویسندگان

  • Luqiao Liu
  • Takahiro Moriyama
  • D C Ralph
  • R A Buhrman
چکیده

We demonstrate that the spin Hall effect in a thin film with strong spin-orbit scattering can excite magnetic precession in an adjacent ferromagnetic film. The flow of alternating current through a Pt/NiFe bilayer generates an oscillating transverse spin current in the Pt, and the resultant transfer of spin angular momentum to the NiFe induces ferromagnetic resonance dynamics. The Oersted field from the current also generates a ferromagnetic resonance signal but with a different symmetry. The ratio of these two signals allows a quantitative determination of the spin current and the spin Hall angle.

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عنوان ژورنال:
  • Physical review letters

دوره 106 3  شماره 

صفحات  -

تاریخ انتشار 2011