Geometric phase analysis of magnetic skyrmion lattices in Lorentz transmission electron microscopy images.

ABSTRACT: Magnetic skyrmions are quasi-particles with a swirling spin texture that form two-dimensional lattices. Skyrmion lattices can exhibit defects in response to geometric constraints, variations of temperature or applied magnetic fields. Measuring deformations in skyrmion lattices is important to understand the interplay between the lattice structure and external influences. Geometric phase analysis (GPA) is a Fourier-based image processing method that is used to measure deformation fields in high resolution transmission electron microscopy (TEM) images of crystalline materials. Here, we show that GPA can be applied quantitatively to Lorentz TEM images of two-dimensional skyrmion lattices obtained from a chiral magnet of FeGe. First, GPA is used to map deformation fields around a 5-7 dislocati

SUBMITTER: Denneulin T 

PROVIDER: S-EPMC11637029 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature