Title: A repulsive skyrmion chain as guiding track for a race track memory,
Abstract: A skyrmion racetrack design is proposed that allows for thermally stable
skyrmions to code information and dynamical pinning sites that move with the
applied current. This concept solves the problem of intrinsic distributions of
pinning times and pinning currents of skyrmions at static geometrical or
magnetic pinning sites. The dynamical pinning sites are realized by a skyrmion
carrying wire, where the skyrmion repulsion is used in order to keep the
skyrmions at equal distances. The information is coded by an additional layer
where the presence and absence of a skyrmion is used to code the information.
The lowest energy barrier for a data loss is calculated to be DE = 55 kBT300
which is sufficient for long time thermal stability.