Imaging vortices by Xrays

X-ray imaging of vortex cores in confined magnetic structures.
Peter Fischer, Mi-Young Im, Shinya Kasai, Keisuke Yamada, Teruo Ono, and André Thiaville

Phys. Rev. B 83, 212402 (2011)

Magnetic transmission soft x-ray microscopy images of
permalloy disks with 500 nm radius and film thickness of (a) 150 nm,
(b) 100 nm, and (c) 50 nm. Detailed views of some vortex cores, one
for each thickness, are shown in (d)–(f).