Magnetic skyrmions have interesting properties,including their small size,topological stability,and extremely low threshold current for current-driven motion.Therefore,they are regarded as promising candidates for nex...Magnetic skyrmions have interesting properties,including their small size,topological stability,and extremely low threshold current for current-driven motion.Therefore,they are regarded as promising candidates for next-generation magnetic memory devices.Lorentz transmission electron microscopy(TEM)has an ultrahigh magnetic domain resolution(~2 nm),it is thus an ideal method for direct real-space imaging of fine magnetic configurations of ultra-small skyrmions.In this paper,we describe the basic principles of Lorentz-TEM and off-axis electron holography and review recent experimental developments in magnetic skyrmion imaging using these two methods.展开更多
基金Project supported by the National Key Research and Development Program of China,(Grant No.2017YFA0303201)the Key Research Program of Frontier Sciences,CAS,(Grant No.QYZDB-SSW-SLH009)+2 种基金the National Natural Science Foundation of China(Grant Nos.51622105 and 11804343)the President Foundation of Hefei Institutes of Physical Science,CAS(Grant No.YZJJ2018QN15)the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology,(Grant No.2016FXCX001)
文摘Magnetic skyrmions have interesting properties,including their small size,topological stability,and extremely low threshold current for current-driven motion.Therefore,they are regarded as promising candidates for next-generation magnetic memory devices.Lorentz transmission electron microscopy(TEM)has an ultrahigh magnetic domain resolution(~2 nm),it is thus an ideal method for direct real-space imaging of fine magnetic configurations of ultra-small skyrmions.In this paper,we describe the basic principles of Lorentz-TEM and off-axis electron holography and review recent experimental developments in magnetic skyrmion imaging using these two methods.
