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Schattschneider, P., Löffler, S., Stöger-Pollach, M., & Verbeeck, J. (2014). Is magnetic chiral dichroism feasible with electron vortices? Ultramicroscopy, 136, 81–85. https://doi.org/10.1016/j.ultramic.2013.07.012
E057-02 - Fachbereich Universitäre Serviceeinrichtung für Transmissions- Elektronenmikroskopie E138-03 - Forschungsbereich Functional and Magnetic Materials
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Journal:
Ultramicroscopy
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ISSN:
0304-3991
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Date (published):
2014
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Number of Pages:
5
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Peer reviewed:
Yes
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Keywords:
Electronic, Optical and Magnetic Materials; Atomic and Molecular Physics, and Optics; Instrumentation; EMCD; Inelastic scattering; Orbital angular momentum; Electron vortices
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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 the ferromagnetic d metals. It is shown that under realistic conditions, the dichroic signal is undetectable for nanoparticles larger than 1 nm. This is con rmed by a key experiment with nanometer sized vortices.
