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

Danilov, A.P. and Scherbakov, A.V. and Glavin, B.A. and Linnik, T.L. and Kalashnikova, A.M. and Shelukhin, L.A. and Pattnaik, D.P. and Rushforth, A.W. and Love, C.J. and Cavill, S.A. and Yakovlev, D.R. and Bayer, M. (2018) Optically excited spin pumping mediating collective magnetization dynamicsin a spin valve structure. Physical Review B, 98 (6). 060406. ISSN 2469-9969

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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.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1103/PhysRevB.98.060406
Depositing User: Rushforth, Andrew
Date Deposited: 25 Jul 2018 08:26
Last Modified: 20 Sep 2018 09:52
URI: http://eprints.nottingham.ac.uk/id/eprint/53114

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