Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 2: Magnetic Imaging Techniques
MA 2.1: Vortrag
Montag, 5. September 2022, 09:30–09:45, H37
High resolution magnetic imaging with holography-aided phase retrieval — •Riccardo Battistelli1, Sergey Zayko2, Michael Schneider3, Christian M. Günther4, Kathinka Gerlinger3, Daniel Metternich1, Lisa-Marie Kern3, Kai Litzius5, Stefan Eisebitt3,4, Bastian Pfau3, and Felix Büttner1 — 1Helmholtz-Zentrum Berlin, Berlin, Germany — 2University of Göttingen, Göttingen, Germany — 3Max Born Institute, Berlin, Germany — 4Technische Universität Berlin, Berlin, Germany — 5Max-Planck-Institut für Intelligente Systeme, Stuttgart, Germany
In the fields of magnetism and spintronics, magnetic multilayers continue to thrive as pivotal structures to functionalize magnetic interactions and to engineer complex non-trivial spin textures. Despite the intense research on this topic, relatively little is known about 3D magnetic textures in multilayers and their interaction with local defects, despite the expected richer physics and potential in information technologies. The experimental challenges of studying such systems can be met by merging Fourier Transform Holography with phase retrieval algorithms for coherent diffractive imaging, obtaining high throughput, high resolution and high contrast images of magnetic materials. Here we present 5 nm resolution X-ray images of magnetic multilayers in which the presence of 3D magnetic defects can be inferred thanks to the high sensitivity of the technique. The interaction of magnetic domains with these defects favors the presence of domain walls, reducing the average domain size with respect to the pristine material.