Skyrmion-skyrmion and skyrmion-edge repulsions in skyrmion-based racetrack memory

By Xichao Zhang, Guoping Zhao, Hans Fangohr, J. P. Liu, W. Xia, J. Xia, F. Morvan. Scientific Reports, 2014

457 citations recorded by the source corpus.

Magnetic skyrmions are promising for building next-generation magnetic memories and spintronic devices due to their stability, small size and the extremely low currents needed to move them. In particular, skyrmion-based racetrack memory is attractive for information technology, where skyrmions are used to store information as data bits instead of traditional domain walls. Here we numerically demonstrate the impacts of skyrmion-skyrmion and skyrmion-edge repulsions on the feasibility of skyrmion-based racetrack memory. The reliable and practicable spacing between consecutive skyrmionic bits on the racetrack as well as the ability to adjust it are investigated. Clogging of skyrmionic bits is found at the end of the racetrack, leading to the reduction of skyrmion size. Further, we demonstrate an effective and simple method to avoid the clogging of skyrmionic bits, which ensures the elimination of skyrmionic bits beyond the reading element. Our results give guidance for the design and development of future skyrmion-based racetrack memory.

Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/622966edc068f6d9c1fd027dbbeebd9ace8ffe14

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In Atomic and Molecular Physics, and Optics

  1. Weisheng Zhao
  2. Xichao Zhang
  3. M. Ezawa
  4. Yan Zhou

In Electronic, Optical and Magnetic Materials

  1. Xichao Zhang
  2. M. Ezawa
  3. Yan Zhou

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