FA-03: Tracking 3D magnetic topological nanodefects with X-rays

In recent years, there has been a surge of interest in expanding from two to three dimensional (3D) magnetic systems [1,2]. This extra dimension brings new magnetic textures [3-5], which promise applications in information storage and processing [6,7]. The detection and 3D visualization of these nanometric magnetic textures has been made possible by the development of magnetic tomography [8]. We have recently extended magnetic tomography to soft X-ray holography, allowing for the high spatial resolution imaging of textures within thick samples [9]. Secondly, we have combined 3D X-ray magnetic imaging with the application of in situ magnetic fields, allowing for the tracking of the field-driven motion of topological magnetic defects, such as Bloch points, merons and vortices [10]. These advances establish necessary capabilities for the study of the behavior of topological textures in 3D, opening the door to insights into three dimensional magnetic textures.References: [1] Streubel et al., J. Phys. D 49, 363001 (2016); [2] Fernández-Pacheco et al., Nat. Commun. 8, 15756 (2017); [3] Hierro-Rodriguez et al., Nat. Commun. 11, 6382 (2020); [4] Donnelly et al., Nature Physics 17, 316–321 (2021); [5] Kent et al., Nat. Commun. 12, 1562 (2021); [6] Meng et al., Micromachines 12, 859 (2021); [7] Göbel et al., Physics Reports 895 (2021); [8] Donnelly et al., Nature 547, 328 (2017); [9] Di Pietro Martínez et al., PRB 107, 094425 (2023); [10] Di Pietro Martínez et al., In preparation.