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MA: Fachverband Magnetismus
MA 41: Poster III
MA 41.15: Poster
Donnerstag, 20. März 2025, 15:00–17:30, P3
Wide-field magnetic microscopy of two-dimensional magnetic materials with chiral overlayers — •Buddhika Hondamuni1, Nir Bar-Gill3, Angela Wittmann2, and Dmitry Budker1 — 1Helmholtz Institute Mainz, Staudingerweg 18, 55128 Mainz, Germany — 2Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany — 3Hebrew University, Jerusellem, Israel
The objective is to investigate the interplay between magnetic domain structures (or skyrmions) in samples with Perpendicular Magnetic Anisotropy (PMA) and chiral polypeptides. Using Nitrogen Vacancy (NV) center-based continuous wave Optically Detected Magnetic Resonance (cw-ODMR) for stray magnetic field imaging in wide-field with a spatial resolution of ∼ 0.8 µm and magnetometric sensitivity up to sub-µT/√Hz range within a field of view (FOV) of approximately 60 × 60 µm2, we study how chiral molecules influence magnetic textures including magnetic domain pinning and coercive force changes. The Chirality Induced Spin Selectivity (CISS) effect provides a unique mechanism for manipulating spin orientations through molecular symmetry, offering the potential to control and enhance magnetic domain behavior. This NV-based imaging technique paves the way for advanced magnetic materials and spintronic devices by enabling precise nanoscale analysis of magnetic textures. This work is supported by the Carl Zeiss Stiftung and conducted in collaboration with the Hebrew University of Jerusalem, Israel.
Keywords: Nitrogen Vacancy center; Perpendicular Magnetic Anisotropy; Chirality-Induced Spin Selectivity; Magnetic Domain Pinning; Spintronics