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MA: Fachverband Magnetismus
MA 18: Magnetic Imaging and Sensors I
MA 18.6: Vortrag
Dienstag, 19. März 2024, 10:45–11:00, EB 301
Determination of Magnetic Symmetries by Electron Diffraction — •Oleksandr Zaiets1,2, Carsten Timm3, Jan Rusz4, Subakti Subakti1, and Axel Lubk1,5 — 1Leibniz Institute for Solid State and Materials Research Dresden, Dresden, Germany — 2Faculty of Physics, TU Dresden, Dresden, Germany — 3Institute of Theoretical Physics, TU Dresden, Dresden, Germany — 4Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden — 5Institute of Solid State and Materials Physics, TU Dresden, Dresden, Germany
It is well known that convergent beam electron-beam diffraction methods can be used to determine spatial symmetries of crystalline samples, due to the relationship between the diffraction groups (symmetry group of electron diffraction pattern) and the point group of the sample.[1] In this work we show an extension toward magnetic point groups. We give a complete mapping of magnetic point groups to corresponding diffraction groups for different crystal orientations. We conduct electron scattering simulations in order to verify the group theoretical considerations and show first experimental results.
[1] B. F. Buxton, J. A. Eades, John Wickham Steeds, G. M. Rackham, and Frederick Charles Frank. The symmetry of electron diffraction zone axis patterns. Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 281(1301):171-194, 1976.
Keywords: magnetic symmetry groups; convergent beam electron diffraction; diffraction groups; electron microscopy; antiferromagnetism