title: Is magnetic chiral dichroism feasible with electron vortices?
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.
authors.affiliation: Institut für Festkörperphysik, Technische Universität Wien, A-1040 Wien, Austria. Electronic address: schattschneider@ifp.tuwien.ac.at.
authors.forename: P
authors.initials: P
authors.lastname: Schattschneider
authors.forename: S
authors.initials: S
authors.lastname: Löffler
authors.forename: M
authors.initials: M
authors.lastname: Stöger-Pollach
authors.forename: J
authors.initials: J
authors.lastname: Verbeeck
keywords: EMCD; Electron vortices; Inelastic scattering; Orbital angular momentum