Berlin 2024 – scientific programme
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MA: Fachverband Magnetismus
MA 18: Magnetic Imaging and Sensors I
MA 18.8: Talk
Tuesday, March 19, 2024, 11:30–11:45, EB 301
Coherent x-ray magnetic imaging with 5 nm resolution — •Riccardo Battistelli1,2, Daniel Metternich1,2, Michael Schneider3, Lisa-Marie Kern3, Kai Litzius2, Josefin Fuchs3, Christopher Klose3, Kathinka Gerlinger3, Kai Bagschik4, Christian Günther5, Dieter Engel3, Claus Ropers6,7, Stefan Eisebitt3,8, Bastian Pfau3, Felix Büttner1,2, and Sergey Zayko6,7 — 1Helmholtz-Zentrum Berlin — 2Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg — 3Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy — 4Deutsches Elektronen-Synchrotron (DESY) — 5Technische Universität Berlin, Zentraleinrichtung Elektronenmikroskopie (ZELMI) — 6Max Planck Institute for Multidisciplinary Sciences — 74th Physical Institute, University of Göttingen — 8Technische Universität Berlin, Institut für Optik und Atomare Physik
Soft x-ray microscopy plays an important role in modern spintronics, but the resolution of most x-ray magnetic imaging experiments is above 10 nm, limiting access to fundamental length scales. Here, we demonstrate x-ray magnetic microscopy with 5 nm resolution by combining holography-assisted coherent diffractive imaging with heterodyne amplification of the weak magnetic signal. The gain in resolution and contrast allows direct access to key magnetic properties, including domain wall profiles and the position of pinning sites.
Keywords: Coherent diffractive imaging; high resolution imaging; magnetic domain walls; magnetic pinning; phase retrieval