Is magnetic chiral dichroism feasible with electron vortices?

2013/04/30 by Peter Schattschneider, Stefan Löffler, Michael Stöger-Pollach +1 · 1 citation
Physics and Astronomy · #quant-ph #cond-mat.mtrl-sci #physics.optics

paper · pdf · doi:10.1016/j.ultramic.2013.07.012

published as Ultramicroscopy 136 (2014) 81

arxiv created 2013/05/29 · arxiv updated 2017/02/16

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 L_2,3 edge of the 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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