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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

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.

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), Article 060406. https://doi.org/10.1103/PhysRevB.98.060406

Journal Article Type Article
Acceptance Date Jul 20, 2018
Online Publication Date Aug 13, 2018
Publication Date Aug 13, 2018
Deposit Date Jul 25, 2018
Publicly Available 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
DOI https://doi.org/10.1103/PhysRevB.98.060406
Public URL https://nottingham-repository.worktribe.com/output/947376
Publisher URL https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.060406

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