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Achieving Atomic Resolution Magnetic Dichroism by Controlling the Phase Symmetry of an Electron Probe
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.ORCID iD: 0000-0002-0074-1349
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 113, no 14, 145501- p.Article in journal (Refereed) Published
Abstract [en]

The calculations presented here reveal that an electron probe carrying orbital angular momentum is just a particular case of a wider class of electron beams that can be used to measure electron magnetic circular dichroism (EMCD) with atomic resolution. It is possible to obtain an EMCD signal with atomic resolution by simply breaking the symmetry of the electron probe phase distribution using the aberration-corrected optics of a scanning transmission electron microscope. The required phase distribution of the probe depends on the magnetic symmetry and crystal structure of the sample. The calculations indicate that EMCD signals utilizing the phase of the electron probe are as strong as those obtained by nanodiffraction methods.

Place, publisher, year, edition, pages
2014. Vol. 113, no 14, 145501- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-237321DOI: 10.1103/PhysRevLett.113.145501ISI: 000343666500008PubMedID: 25325649OAI: oai:DiVA.org:uu-237321DiVA: diva2:767566
Available from: 2014-12-01 Created: 2014-12-01 Last updated: 2017-12-05Bibliographically approved

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Rusz, Jan

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