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Nanoscale interface confinement of ultrafast spin transfer torque driving non-uniform spin dynamics

Author

Listed:
  • Ilya Razdolski

    (Fritz Haber Institute of Max Planck Society)

  • Alexandr Alekhin

    (Fritz Haber Institute of Max Planck Society)

  • Nikita Ilin

    (Fritz Haber Institute of Max Planck Society
    Moscow Technological University MIREA)

  • Jan P. Meyburg

    (Faculty of Chemistry, University of Duisburg-Essen)

  • Vladimir Roddatis

    (Universität Göttingen, Institut für Materialphysik)

  • Detlef Diesing

    (Faculty of Chemistry, University of Duisburg-Essen)

  • Uwe Bovensiepen

    (Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen)

  • Alexey Melnikov

    (Fritz Haber Institute of Max Planck Society
    Institute of Physics, Martin Luther University Halle-Wittenberg)

Abstract

Spintronics had a widespread impact over the past decades due to transferring information by spin rather than electric currents. Its further development requires miniaturization and reduction of characteristic timescales of spin dynamics combining the sub-nanometre spatial and femtosecond temporal ranges. These demands shift the focus of interest towards the fundamental open question of the interaction of femtosecond spin current (SC) pulses with a ferromagnet (FM). The spatio-temporal properties of the impulsive spin transfer torque exerted by ultrashort SC pulses on the FM open the time domain for probing non-uniform magnetization dynamics. Here we employ laser-generated ultrashort SC pulses for driving ultrafast spin dynamics in FM and analysing its transient local source. Transverse spins injected into FM excite inhomogeneous high-frequency spin dynamics up to 0.6 THz, indicating that the perturbation of the FM magnetization is confined to 2 nm.

Suggested Citation

  • Ilya Razdolski & Alexandr Alekhin & Nikita Ilin & Jan P. Meyburg & Vladimir Roddatis & Detlef Diesing & Uwe Bovensiepen & Alexey Melnikov, 2017. "Nanoscale interface confinement of ultrafast spin transfer torque driving non-uniform spin dynamics," Nature Communications, Nature, vol. 8(1), pages 1-5, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15007
    DOI: 10.1038/ncomms15007
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