Current-driven transformations of a skyrmion tube and a bobber in stepped nanostructures of chiral magnets

作者：Jin Zhu,YaoDong Wu,QiYang Hu,LingYao Kong,Jin Tang,MingLiang Tian,HaiFeng Du

摘要：Magnetic skyrmion tubes and bobbers are two types of different nanoscale spin configurations that can coexist in nanostructures of chiral magnets.They are then proposed to be utilized as binary bits to build racetrack memory devices.The ability to manipulate the two magnetic objects controllably by current in nanostructures is the prerequisite to realize the device.Here,we demonstrate by numerical simulations that a magnetic bobber and a skyrmion tube can be transformed to each other using spinpolarized current in nanostripes with stepped shape.We also show such stepped nanostructures can be readily applied as the write head for the skyrmion-bobber-based racetrack memory.

发文机构：Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions Universities Joint Key Laboratory of Photoelectric Detection Science and Technology in Anhui Province School of Physics and Materials Science Institutes of Physical Science and Information Technology

关键词：SKYRMIONbobberracetrackmemorysteppednanostructureschiralmagnets

分类号： U48[交通运输工程—载运工具运用工程]