• DOI:10.1103/PhysRevB.66.224403
• Corpus ID: 54789784

Spin pumping and magnetization dynamics in metallic multilayers

@article{Tserkovnyak2002SpinPA,
  title={Spin pumping and magnetization dynamics in metallic multilayers},
  author={Yaroslav Tserkovnyak and Arne Brataas and Gerrit E. W. Bauer},
  journal={Physical Review B},
  year={2002},
  volume={66},
  pages={224403}
}

• Y. Tserkovnyak, A. Brataas, G. Bauer
• Published 6 August 2002
• Physics
• 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 when a spin accumulation build-up in the normal metal opposes the spin pumping. The damping enhancement is governed by ~and, in turn, can be used to measure! the mixing conductance or spin-torque parameter of the ferromagnet‐normal-metal interface. Our theoretical findings are confirmed by agreement with recent experiments in a variety of multilayer systems.