We discuss the feasibility of detecting spin polarized electronic transitions with a vortex filter. This approach does not rely on the principal condition of the standard energy loss magnetic chiral dichroism (EMCD) technique, the precise alignment of the crystal, and thus paves the way for the application of EMCD to new classes of materials and problems. The dichroic signal strength in the L2,3-edge of ferromagnetic cobalt is estimated on theoretical grounds. It is shown that magnetic dichroism can, in principle, be detected. However, as an experimental test shows, count rates are currently too low under standard conditions.
@article{arxiv.1703.09156,
title = {EMCD with an electron vortex filter: Limitations and possibilities},
author = {Thomas Schachinger and Stefan Löffler and Andreas Steiger-Thirsfeld and Michael Stöger-Pollach and Sebastian Schneider and Darius Pohl and Bernd Rellinghaus and Peter Schattschneider},
journal= {arXiv preprint arXiv:1703.09156},
year = {2017}
}