Dynamic exchange coupling and Gilbert damping in magnetic multilayers
arXiv:cond-mat/0304116 · doi:10.1063/1.1538173
Abstract
We theoretically study dynamic properties of thin ferromagnetic films in contact with normal metals. Moving magnetizations cause a flow of spins into adjacent conductors, which relax by spin flip, scatter back into the ferromagnet, or are absorbed by another ferromagnet. Relaxation of spins outside the moving magnetization enhances the overall damping of the magnetization dynamics in accordance with the Gilbert phenomenology. Transfer of spins between different ferromagnets by these nonequilibrium spin currents leads to a long-ranged dynamic exchange interaction and novel collective excitation modes. Our predictions agree well with recent ferromagnetic-resonance experiments on ultrathin magnetic films.
15 pages, 3 figures, for MMM'02 proceedings
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Cited by in corpus (8)
- Nonlocal magnetization dynamics in ferromagnetic heterostructures
- First-principles study of magnetization relaxation enhancement and spin-transfer in thin magnetic films
- Magnetization precession due to a spin polarized current in a thin nanoelement: numerical simulation study
- Weakly Coupled Motion of Individual Layers in Ferromagnetic Resonance
- Spin Pumping into Anisotropic Dirac Electrons
- Phase dynamics of oscillating magnetizations coupled via spin pumping
- Spin-current driven spontaneous coupling of ferromagnets
- Coupled dynamics of magnetizations in spin-Hall oscillators via spin current injection