Schattschneider P, Löffler S, Stöger-Pollach M, Verbeeck J. Is magnetic chiral dichroism feasible with electron vortices?
Ultramicroscopy 2014;
136:81-5. [PMID:
24012939 PMCID:
PMC3866682 DOI:
10.1016/j.ultramic.2013.07.012]
[Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 07/15/2013] [Accepted: 07/19/2013] [Indexed: 11/02/2022]
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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