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Ultrafast spin-transfer torque driven by femtosecond pulsed-laser excitation

Author

Listed:
  • A. J. Schellekens

    (Center for NanoMaterials (cNM), Eindhoven University of Technology)

  • K. C. Kuiper

    (Center for NanoMaterials (cNM), Eindhoven University of Technology)

  • R.R.J.C. de Wit

    (Center for NanoMaterials (cNM), Eindhoven University of Technology)

  • B Koopmans

    (Center for NanoMaterials (cNM), Eindhoven University of Technology)

Abstract

Spin currents have an important role in many proposed spintronic devices, as they govern the switching process of magnetic bits in random access memories or drive domain wall motion in magnetic shift registers. The generation of these spin currents has to be fast and energy efficient for realization of these envisioned devices. Recently it has been shown that femtosecond pulsed-laser excitation of thin magnetic films creates intense and ultrafast spin currents. Here we utilize this method to change the orientation of the magnetization in a magnetic bilayer by spin-transfer torque on sub-picosecond timescales. By analysing the dynamics of the magnetic bilayer after laser excitation, the rich physics governing ultrafast spin-transfer torque are elucidated opening up new pathways to ultrafast magnetization reversal, but also providing a new method to quantify optically induced spin currents generated on femtosecond timescales.

Suggested Citation

  • A. J. Schellekens & K. C. Kuiper & R.R.J.C. de Wit & B Koopmans, 2014. "Ultrafast spin-transfer torque driven by femtosecond pulsed-laser excitation," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5333
    DOI: 10.1038/ncomms5333
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    Cited by:

    1. Masakazu Matsubara & Takatsugu Kobayashi & Hikaru Watanabe & Youichi Yanase & Satoshi Iwata & Takeshi Kato, 2022. "Polarization-controlled tunable directional spin-driven photocurrents in a magnetic metamaterial with threefold rotational symmetry," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Kyuhwe Kang & Hiroki Omura & Daniel Yesudas & OukJae Lee & Kyung-Jin Lee & Hyun-Woo Lee & Tomoyasu Taniyama & Gyung-Min Choi, 2023. "Spin current driven by ultrafast magnetization of FeRh," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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