Proximity-effect–assisted decay of spin currents in superconductors

The injection of pure spin current into superconductors by the dynamics of a ferromagnetic contact is studied theoretically. Taking into account the suppression of the order parameter at the interfaces (inverse proximity effect) and the energy-dependence of spin-flip scattering, we determine the tem...

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Bibliographic Details
Published in:Europhysics letters 2008-12, Vol.84 (5), p.57008-57008(5)
Main Authors: Morten, J. P, Brataas, A, Bauer, G. E. W, Belzig, W, Tserkovnyak, Y
Format: Article
Language:English
Subjects:
74.25.Fy
74.78.Na
85.75.-d
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Summary:The injection of pure spin current into superconductors by the dynamics of a ferromagnetic contact is studied theoretically. Taking into account the suppression of the order parameter at the interfaces (inverse proximity effect) and the energy-dependence of spin-flip scattering, we determine the temperature-dependent ferromagnetic resonance linewidth broadening. Our results compare well with recent experiments in Nb|permalloy bilayers (Bell C. et al., Phys. Rev. Lett., 100 (2008) 047002).
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/84/57008