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Is magnetic chiral dichroism feasible with electron vortices?
P Schattschneider1, S Löffler, M Stöger-Pollach
1Institut für Festkörperphysik, Technische Universität Wien, A-1040 Wien, Austria.
Abstract:
We discuss the feasibility of detecting magnetic transitions with focused electron vortex probes, suggested by selection rules for the magnetic quantum number. We theoretically estimate the dichroic signal strength in the L₂,₃ edge of ferromagnetic d metals. It is shown that under realistic conditions, the dichroic signal is undetectable for nanoparticles larger than ∼1 nm. This is confirmed by a key experiment with nanometer-sized vortices.
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