Characterisation of Ferromagnetic Rings for Zernike Phase Plates using the Aharonov-Bohm effect

C. J. Edgcombe, A. Ionescu, J. C. Loudon +3

Holographic measurements on magnetised thin-film cobalt rings have demonstrated both onion and vortex states of magnetisation. For a ring in the vortex state, the difference betwee…