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Pohl D, Schneider S, Zeiger P, et al. Atom size electron vortex beams with selectable orbital angular momentum. Sci Rep. 2017;7(1):934doi: 10.1038/s41598-017-01077-9.
Pohl, D., Schneider, S., Zeiger, P., Rusz, J., Tiemeijer, P., Lazar, S., Nielsch, K., & Rellinghaus, B. (2017). Atom size electron vortex beams with selectable orbital angular momentum. Scientific reports, 7(1), 934. https://doi.org/10.1038/s41598-017-01077-9
Pohl, Darius, et al. "Atom size electron vortex beams with selectable orbital angular momentum." Scientific reports vol. 7,1 (2017): 934. doi: https://doi.org/10.1038/s41598-017-01077-9
Pohl D, Schneider S, Zeiger P, Rusz J, Tiemeijer P, Lazar S, Nielsch K, Rellinghaus B. Atom size electron vortex beams with selectable orbital angular momentum. Sci Rep. 2017 Apr 19;7(1):934. doi: 10.1038/s41598-017-01077-9. PMID: 28424470; PMCID: PMC5430437.
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Sci Rep. 2017 Apr 19;7(1):934. doi: 10.1038/s41598-017-01077-9.

Atom size electron vortex beams with selectable orbital angular momentum.

Scientific reports

Darius Pohl, Sebastian Schneider, Paul Zeiger, Ján Rusz, Peter Tiemeijer, Sorin Lazar, Kornelius Nielsch, Bernd Rellinghaus

Affiliations

  1. IFW Dresden, Institute for Metallic Materials, Helmholtzstrasse 20, D-01069, Dresden, Germany. [email protected].
  2. IFW Dresden, Institute for Metallic Materials, Helmholtzstrasse 20, D-01069, Dresden, Germany.
  3. TU Dresden, Institute for Solid State Physics, D-01062, Dresden, Germany.
  4. Uppsala University, Department of Physics and Astronomy, SE-752 37, Uppsala, Sweden.
  5. FEI Company, PO Box 80066, 5600, KA, Eindhoven, The Netherlands.
  6. TU Dresden, Institut für Werkstoffwissenschaft, D-01062, Dresden, Germany.

PMID: 28424470 PMCID: PMC5430437 DOI: 10.1038/s41598-017-01077-9

Abstract

The decreasing size of modern functional magnetic materials and devices cause a steadily increasing demand for high resolution quantitative magnetic characterization. Transmission electron microscopy (TEM) based measurements of the electron energy-loss magnetic chiral dichroism (EMCD) may serve as the needed experimental tool. To this end, we present a reliable and robust electron-optical setup that generates and controls user-selectable single state electron vortex beams with defined orbital angular momenta. Our set-up is based on a standard high-resolution scanning TEM with probe aberration corrector, to which we added a vortex generating fork aperture and a miniaturized aperture for vortex selection. We demonstrate that atom size probes can be formed from these electron vortices and that they can be used for atomic resolution structural and spectroscopic imaging - both of which are prerequisites for future atomic EMCD investigations.

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