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Optically excited spin pumping mediating collective magnetization dynamicsin a spin valve structure

Danilov, A.P.; Scherbakov, A.V.; Glavin, B.A.; Linnik, T.L.; Kalashnikova, A.M.; Shelukhin, L.A.; Pattnaik, D.P.; Rushforth, A.W.; Love, C.J.; Cavill, S.A.; Yakovlev, D.R.; Bayer, M.

Authors

A.P. Danilov

A.V. Scherbakov

B.A. Glavin

T.L. Linnik

A.M. Kalashnikova

L.A. Shelukhin

D.P. Pattnaik

A.W. Rushforth Andrew.Rushforth@nottingham.ac.uk

C.J. Love

S.A. Cavill

D.R. Yakovlev

M. Bayer



Abstract

We demonstrate spin pumping, i.e. the generation of a pure spin current by precessing magnetization, without application of microwave radiation commonly used in spin pumping experiments. We use femtosecond laser pulses to simultaneously launch the magnetization precession in each of two ferromagnetic layers of a Galfenol-based spin valve and monitor the temporal evolution of the magnetizations. The spin currents generated by the precession cause a dynamic coupling of the two layers. This coupling has dissipative character and is especially efficient when the precession frequencies in the two layers are in resonance, where coupled modes with strongly different decay rates are formed.

Journal Article Type Article
Publication Date Aug 13, 2018
Journal Physical Review B
Print ISSN 2469-9950
Electronic ISSN 2469-9969
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 98
Issue 6
Article Number 060406
APA6 Citation Danilov, A., Scherbakov, A., Glavin, B., Linnik, T., Kalashnikova, A., Shelukhin, L., …Bayer, M. (2018). Optically excited spin pumping mediating collective magnetization dynamicsin a spin valve structure. Physical Review B, 98(6), doi:10.1103/PhysRevB.98.060406
DOI https://doi.org/10.1103/PhysRevB.98.060406
Publisher URL https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.060406
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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