Controlled creation of nanometric skyrmions using external magnetic fields

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  • Masahito Mochizuki
    Department of Applied Physics, Waseda University , Okubo, Shinjuku-ku, Tokyo 169-8555, Japan ; , Sagamihara, Kanagawa 229-8558, Japan ; and , Kawaguchi, Saitama 332-0012, Japan

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<jats:p>To exploit nanometric magnetic skyrmions as information carriers in high-density storage devices, a method is needed that creates an intended number of skyrmions at specified places in the device preferably at a low energy cost. We theoretically propose that using a system with a fabricated hole or notch, the controlled creation of individual skyrmions can be achieved even when using an external magnetic field applied to the entire specimen. The fabricated defect turns out to work like a catalyst to reduce the energy barrier for the skyrmion creation.</jats:p>

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