Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 64: Poster 1

MA 64.4: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-EG

Thickness dependence of the appearance of the skyrmion phase in FeGe: A TEM study — •Sebastian Schneider1,2, Darius Pohl1, Ulrich K. Rößler3, Marcus Schmidt4, Axel Lubk5, Thomas Gemming6, Kornelius Nielsch1,7, Sebastian T. B. Goennenwein2, and Bernd Rellinghaus11IFW Dresden, Institute for Metallic Materials, Dresden — 2TU Dresden, Institute of Solid State Physics, Dresden — 3IFW Dresden, Institute for Theoretical Solid State Physics, Dresden — 4Max-Planck Institute for Chemical Physics of Solids, Research Field Chemical Metals Science, Dresden — 5IFW Dresden, Institute for Solid State Research, Dresden — 6IFW Dresden, Institute for Complex Materials, Dresden — 7TU Dresden, Institute of Materials Science, Dresden

Novel nanoscale magnetic phenomena such as skyrmions cause a steadily increasing demand for ultra-high resolution quantitative magnetic characterization. Here, transmission electron microscopy (TEM) provides the possibility to locally correlate the magnetic properties of the sample with its structure and chemical composition thereby providing for a more complete picture of the underlying physics. We investigate the skyrmion phase of a thin lamella of a FeGe single crystal in Lorentz-TEM (LTEM). Corresponding thickness measurements of sample areas under investigation reveal a breakdown of the skyrmion phase below film thicknesses of 40 nm. We furthermore report on the lateral components of the magnetization in skyrmions by applying the transport of intensity equation to focal series of LTEM images.

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