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Depinning probability of a magnetic domain wall in nanowires by spin-polarized currents

Author

Listed:
  • S. Fukami

    (Center for Spintronics Integrated Systems, Tohoku University)

  • M. Yamanouchi

    (Center for Spintronics Integrated Systems, Tohoku University
    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University)

  • S. Ikeda

    (Center for Spintronics Integrated Systems, Tohoku University
    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University)

  • H. Ohno

    (Center for Spintronics Integrated Systems, Tohoku University
    Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University
    WPI Advanced Institute for Materials Research, Tohoku University)

Abstract

Current-induced magnetic domain wall motion is attractive for manipulating magnetization direction in spintronics devices, which open a new era of electronics. Up to now, in spite of a crucial significance to applications, investigation on a current-induced domain wall depinning probability, especially in sub-nano to a-few-nanosecond range has been lacking. Here we report on the probability of the depinning in perpendicularly magnetized Co/Ni nanowires in this timescale. A high depinning probability was obtained even for 2-ns pulses with a current density of less than 1012 A m−2. A one-dimensional Landau-Lifshitz-Gilbert calculation taking into account thermal fluctuations reproduces well the experimental results. We also calculate the depinning probability as functions of various parameters and found that parameters other than the coercive field do not affect the transition width of the probability. These findings will allow one to design high-speed and reliable magnetic devices based on the domain wall motion.

Suggested Citation

  • S. Fukami & M. Yamanouchi & S. Ikeda & H. Ohno, 2013. "Depinning probability of a magnetic domain wall in nanowires by spin-polarized currents," Nature Communications, Nature, vol. 4(1), pages 1-7, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3293
    DOI: 10.1038/ncomms3293
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