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  Femtosecond Spin Current Pulses Generated by the Nonthermal Spin-Dependent Seebeck Effect and Interacting with Ferromagnets in Spin Valves

Alekhin, A., Razdolski, I., Ilin, N., Meyburg, J. P., Diesing, D., Roddatis, V., et al. (2017). Femtosecond Spin Current Pulses Generated by the Nonthermal Spin-Dependent Seebeck Effect and Interacting with Ferromagnets in Spin Valves. Physical Review Letters, 119(1): 017202. doi:10.1103/PhysRevLett.119.017202.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-A8EB-0 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-A8EC-E
Genre: Journal Article

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PhysRevLett.119.017202.pdf (Publisher version), 957KB
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 Creators:
Alekhin, Alexandr1, Author           
Razdolski, Ilya1, Author           
Ilin, Nikita1, Author           
Meyburg, Jan P.2, Author
Diesing, Detlef2, Author
Roddatis, Vladimir3, Author
Rungger, Ivan4, Author
Stamenova, Maria4, Author
Sanvito, Stefano4, Author
Bovensiepen, Uwe5, Author           
Melnikov, Alexey1, 6, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Faculty of Chemistry, University of Duisburg-Essen, Universitätsstr. 5, 45117 Essen, Germany, ou_persistent22              
3Institute of Materials Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany, ou_persistent22              
4School of Physics and CRANN, Trinity College Dublin, Dublin 2, Ireland, ou_persistent22              
5Universität Diusburg-Essen, Fakultät für Physik, Lotharstr. 1, 47048 Duisburg, ou_persistent22              
6Institute of Physics, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle, Germany, ou_persistent22              

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 Abstract: Using the sensitivity of optical second harmonic generation to currents, we demonstrate the generation of 250-fs long spin current pulses in Fe/Au/Fe/MgO(001) spin valves. The temporal profile of these pulses indicates ballistic transport of hot electrons across a sub-100 nm Au layer. The pulse duration is primarily determined by the thermalization time of laser-excited hot carriers in Fe. Considering the calculated spin-dependent Fe/Au interface transmittance we conclude that a nonthermal spin-dependent Seebeck effect is responsible for the generation of ultrashort spin current pulses. The demonstrated rotation of spin polarization of hot electrons upon interaction with noncollinear magnetization at Au/Fe interfaces holds high potential for future spintronic devices.

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Language(s): eng - English
 Dates: 2016-07-252017-07-062017-07-07
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.119.017202
 Degree: -

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Project name : CRONOS - Time dynamics and ContROl in naNOStructures for magnetic recording and energy applications
Grant ID : 280879
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: 6 Volume / Issue: 119 (1) Sequence Number: 017202 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1