2021
DOI: 10.48550/arxiv.2103.06029
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Probing optical spin-currents using THz spin-waves in noncollinear magnetic bilayers

Tom Lichtenberg,
Maarten Beens,
Menno H. Jansen
et al.

Abstract: Optically induced spin currents have proven to be useful in spintronics applications, allowing for sub-ps all-optical control of magnetization. However, the mechanism responsible for their generation is still heavily debated. Here we use the excitation of spin-current induced THz spin-waves in noncollinear bilayer structures to directly study optical spin-currents in the time domain. We measure a significant laser-fluence dependence of the spin-wave phase, which can quantitatively be explained assuming the spi… Show more

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Cited by 2 publications
(12 citation statements)
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“…This expression is identical to the relation as reported in Ref. [42]. Contrasting behavior is found when we switch to g 2 = 0, when all spins are blocked at x = d N .…”
Section: Bulk Electron-magnon Scatteringsupporting
confidence: 88%
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“…This expression is identical to the relation as reported in Ref. [42]. Contrasting behavior is found when we switch to g 2 = 0, when all spins are blocked at x = d N .…”
Section: Bulk Electron-magnon Scatteringsupporting
confidence: 88%
“…The red dashed curve indicates the temporal derivative of the magnetization, scaled by a prefactor that is fitted to the amplitude of the spin current. The comparison indicates a qualitative agreement with the experiments [41,42], as a close relation is expected between the spin current injected into the nonmagnetic layer and the temporal derivative of magnetization. The visible phase shift is interesting in itself, but smaller than the temporal resolution of 40 fs in the experiment in Ref.…”
Section: B Spin Transport In Magnetic Heterostructuressupporting
confidence: 86%
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