This title appears in the Scientific Report :
2021
Please use the identifier:
http://dx.doi.org/10.1017/S1431927621012927 in citations.
Please use the identifier: http://hdl.handle.net/2128/29305 in citations.
Visibility and Apparent Size of Néel-Type Magnetic Skyrmions in Fresnel Defocus Images of Multilayer Films
Visibility and Apparent Size of Néel-Type Magnetic Skyrmions in Fresnel Defocus Images of Multilayer Films
Multilayers that comprise thin films of heavy metals and ferromagnets have been shown to host Néel-type magnetic skyrmions at room temperature. Fresnel defocus imaging in Lorentz transmission electron microscopy is a widely used technique for recording magnetic information about skyrmions. However,...
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Personal Name(s): | Denneulin, Thibaud (Corresponding author) |
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Caron, Jan / Müller-Caspary, Knut (Corresponding author) / Boulle, Olivier / Kovács, András / Dunin-Borkowski, Rafal E. | |
Contributing Institute: |
Physik Nanoskaliger Systeme; ER-C-1 |
Published in: | Microscopy and microanalysis, 27 (2021) 6, S. 1356-1365 |
Imprint: |
New York, NY
Cambridge University Press
2021
|
DOI: |
10.1017/S1431927621012927 |
Document Type: |
Journal Article |
Research Program: |
Enabling Science and Technology through European Electron Microscopy Three-dimensional magnetization textures: Discovery and control on the nanoscale Defense Advanced Research Projects Agency Manipulation of magnetic skyrmions for logicin- memory applications Platform for Correlative, In Situ and Operando Characterization |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/29305 in citations.
Multilayers that comprise thin films of heavy metals and ferromagnets have been shown to host Néel-type magnetic skyrmions at room temperature. Fresnel defocus imaging in Lorentz transmission electron microscopy is a widely used technique for recording magnetic information about skyrmions. However, the visibility of Néel-type skyrmions in Fresnel defocus images is typically low, both because only a small component of their magnetic field contributes to the signal and because of the presence of diffraction contrast from the polycrystalline multilayer structure. Here, we take advantage of the out-of-plane hysteresis in such samples to record background-subtracted Fresnel defocus images. We demonstrate an improvement in magnetic signal-to-noise ratio and spatial resolution by a factor of 3 for a (Pt/Co/NiFe)×5 multilayer. We also use simulated Fresnel defocus images of Néel-type magnetic skyrmions to understand the influence of defocus on apparent skyrmion size. |