Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 20: Poster I
MA 20.44: Poster
Dienstag, 19. März 2024, 16:30–19:00, Poster A
Investigating antiferromagnetic textures in external magnetic fields — •Sebastian Schultheis1, Kai Litzius2, Alexander E. Kossak3, Julian Skolaut1, Olena Gomonay1, and Angela Wittmann1 — 1Johannes Gutenberg-Universität, Mainz, Germany — 2Universität Augsburg, Augsburg, Germany — 3Massachusetts Institute of Technology, Cambridge, United States of America
In recent years, research on antiferromagnets has received significant attention due to their favorable properties, including robustness to magnetic fields and ultrafast spin dynamics. However, the understanding of the mechanisms of formation of antiferromagnetic domain structure is still limited compared to ferromagnets. Here, we investigate the domain structure of canted antiferromagnets - such as hematite (α − Fe2 O3) - in external magnetic field. The well established method of Photoelectron Emission Microscopy (PEEM) does not allow for imaging the magnetic domain structure in sizable magnetic fields. Thus, here we use Scanning Transmission X-ray Microscopy (STXM) with linearly polarized X-rays to record X-ray Linear Magnetic Dichroism (XMLD) images of the antiferromagnetic ordering via total electron yield. [1] The acquired images were evaluated using methods of image processing to extract quantities describing the change in antiferromagnetic domain structure. Detailed analysis of this data will advance our understanding of the underlying mechanisms of domain structure formation in antiferromagnets.
[1] A. Wittmann et al., Phys. Rev. B 106, 224419 (2022)
Keywords: XMLD; STXM; Antiferromagnetic domain structure; Antiferromagnets