Spin pumping and magnetization dynamics in metallic multilayers

  title={Spin pumping and magnetization dynamics in metallic multilayers},
  author={Yaroslav Tserkovnyak and Arne Brataas and Gerrit E. W. Bauer},
  journal={Physical Review B},
We study the magnetization dynamics in thin ferromagnetic films and small ferromagnetic particles in contact with paramagnetic conductors. A moving magnetization vector causes ‘‘pumping’’ of spins into adjacent nonmagnetic layers. This spin transfer affects the magnetization dynamics similar to the Landau-LifshitzGilbert phenomenology. The additional Gilbert damping is significant for small ferromagnets, when the nonmagnetic layers efficiently relax the injected spins, but the effect is reduced… 

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