1. Spin pumping in YIG/Pt bilayers as a function of layer thickness.
- Author
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Haertinger, M., Back, C. H., Lotze, J., Weiler, M., Geprägs, S., Huebl, H., and Woltersdorf, G.
- Subjects
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YTTRIUM iron garnet , *FERROMAGNETIC resonance , *FERROMAGNETIC materials , *HALL effect , *ELECTRIC insulators & insulation , *GOLD spectra - Abstract
We systematically investigate the spin-pumping effect in a series of yttrium-iron-garnet (YIG)-platinum (Pt) bilayers, comparing both broadband ferromagnetic resonance and electrically detected spin-pumping experiments. We infer the effective spin-mixing conductance as a function of YIG and Pt layer thickness from ferromagnetic resonance measurements on pure YIG layers as well as on bilayer YIG/Pt samples in a frequency range from 2 to 20 GHz. In bare YIG films, we determine a Gilbert damping constant of approximately α=0.001. With an additional platinum layer on top of the YIG samples, the damping is significantly enhanced. The effective spin-mixing conductance extracted from the ferromagnetic resonance experiments is in agreement with that determined from independent electrically detected spin-pumping experiments. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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