Current-driven dynamics of skyrmions stabilized in MnSi nanowires revealed by topological Hall effect.

ABSTRACT: Skyrmions hold promise for next-generation magnetic storage as their nanoscale dimensions may enable high information storage density and their low threshold for current-driven motion may enable ultra-low energy consumption. Skyrmion-hosting nanowires not only serve as a natural platform for magnetic racetrack memory devices but also stabilize skyrmions. Here we use the topological Hall effect (THE) to study phase stability and current-driven dynamics of skyrmions in MnSi nanowires. THE is observed in an extended magnetic field-temperature window (15-30 K), suggesting stabilization of skyrmions in nanowires compared with the bulk. Furthermore, we show in nanowires that under the high current density of 10(8)-10(9) A m(-2), the THE decreases with increasing current densities, which demonstr

SUBMITTER: Liang D 

PROVIDER: S-EPMC4598358 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature