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Oscillatory dependence of current-driven magnetic domain wall motion on current pulse length

Author

Listed:
  • Luc Thomas

    (IBM Almaden Research Center)

  • Masamitsu Hayashi

    (IBM Almaden Research Center
    Stanford University)

  • Xin Jiang

    (IBM Almaden Research Center)

  • Rai Moriya

    (IBM Almaden Research Center)

  • Charles Rettner

    (IBM Almaden Research Center)

  • Stuart S. P. Parkin

    (IBM Almaden Research Center)

Abstract

Bubble memory comeback? Several decades ago computers used devices called magnetic bubble memories, in which information was stored in small magnetized areas defined by domain walls. The domain walls, where the magnetization changes its direction, were moved by magnetic fields. This otherwise attractive technology had problems with reliability and scaling and gradually fell out of favour. Today an entirely new way of moving domain walls, using short pulses of electrical current, could make bubble memory devices feasible at the nanoscale. Thomas et al. use this technique to move domain walls in ferromagnetic wires on very short timescales, by applying nanosecond-long pulses. They also observe an intriguing 'boomerang' effect, where the domain walls are driven out of their confining potential, in the opposite direction to the current pulse.

Suggested Citation

  • Luc Thomas & Masamitsu Hayashi & Xin Jiang & Rai Moriya & Charles Rettner & Stuart S. P. Parkin, 2006. "Oscillatory dependence of current-driven magnetic domain wall motion on current pulse length," Nature, Nature, vol. 443(7108), pages 197-200, September.
    • Handle: RePEc:nat:nature:v:443:y:2006:i:7108:d:10.1038_nature05093
    DOI: 10.1038/nature05093
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