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- W2752089644 abstract "Magnetic thin films at ferromagnetic resonance (FMR) leak angular momentum, which may be absorbed by adjacent layers. This phenomenon, known as spin pumping, is manifested by an increase in the resonance linewidth ($Delta H$), and the closely related Gilbert damping. Another effect of this transfer of spin currents is a dynamical and long-range coupling that can drive two magnetic layers into a collective precession when their FMR frequencies coincide. A collective behavior is also found in magnetic trilayers with interlayer exchange coupling (IEC). In this study we investigate the interplay between IEC and spin pumping, using Co/Cu/Py pseudo-spin values. We employ broadband FMR spectroscopy to explore both the frequency and coupling-strength dependence of $Delta H$. Our observations show that there exists a cut-off frequency, set by the IEC strength, below which the precession is truly collective and the spin pumping is suppressed. These results demonstrate that it is possible to control the spin pumping efficiency by varying the frequency or the interlayer exchange coupling." @default.
- W2752089644 created "2017-09-15" @default.
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- W2752089644 date "2017-09-07" @default.
- W2752089644 modified "2023-09-27" @default.
- W2752089644 title "Tunable spin pumping in exchange coupled magnetic trilayers" @default.
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