Magnetic skyrmion, a swirling spin texture, in chiral magnets is characterized by (i) nano-scale size (∼1nm -- 100nm), (ii) topological stability, and (iii) gyro-dynamics. These features are shown to be advantageous for (a) high-density data-storage, (b) nonvolatile memory, and (c) ultra-low current and energy cost manipulation, respectively. By the numerical simulations of Landau-Lifshitz-Gilbert equation, the elementary functions of skyrmions are demonstrated aiming at the design principles of skyrmionic memory devices.
@article{arxiv.1501.07650,
title = {Memory functions of magnetic skyrmions},
author = {W. Koshibae and Y. Kaneko and J. Iwasaki and M. Kawasaki and Y. Tokura and N. Nagaosa},
journal= {arXiv preprint arXiv:1501.07650},
year = {2015}
}