Fresnel Magnetic Imaging of Ultrasmall Skyrmion Lattices.

ABSTRACT: Magnetic skyrmions with ultrasmall nanometric dimensions hold significant promise for next-generation high-density spintronic devices. Direct real-space imaging of these topological spin textures is critical for elucidating their emergent properties at the nanoscale. Here, Lorentz transmission electron microscopy studies of nanometric skyrmion lattices in B20-structured Mn_0.5Fe_0.5Ge crystals are presented using the Fresnel mode. According to conventional chiral discrimination methods relying on static bright-dark contrast, an abnormal periodic chiral-reversal phenomenon is demonstrated, retrieved through the transport of intensity equation analysis of defocus-dependent Fresnel images. Through systematic off-axis electron holography experiments and numerical simulation

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC12822451 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature