Home > Publications database > Visibility and Apparent Size of Néel-Type Magnetic Skyrmions in Fresnel Defocus Images of Multilayer Films > print

001     902149
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100 1 _ |a Denneulin, Thibaud
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245 _ _ |a Visibility and Apparent Size of Néel-Type Magnetic Skyrmions in Fresnel Defocus Images of Multilayer Films
260 _ _ |a New York, NY
|c 2021
|b Cambridge University Press
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520 _ _ |a 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.
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536 _ _ |a DARPA, Phase 2 - Defense Advanced Research Projects Agency Manipulation of magnetic skyrmions for logicin- memory applications (Z1422.01.18)
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536 _ _ |a 3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538)
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700 1 _ |a Caron, Jan
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700 1 _ |a Müller-Caspary, Knut
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700 1 _ |a Boulle, Olivier
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700 1 _ |a Kovács, András
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700 1 _ |a Dunin-Borkowski, Rafal E.
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773 _ _ |a 10.1017/S1431927621012927
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|t Microscopy and microanalysis
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|y 2021
|x 1435-8115
856 4 _ |y OpenAccess
|u https://juser.fz-juelich.de/record/902149/files/Visibility%20and%20apparent.pdf
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|u https://juser.fz-juelich.de/record/902149/files/visibility-and-apparent-size-of-neel-type-magnetic-skyrmions-in-fresnel-defocus-images-of-multilayer-films.pdf
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