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Instruments / Technical Area	Publication Details	Published	Actions
I06-Nanoscience (XPEEM)	Defect-driven antiferromagnetic domain walls in CuMnAs films Sonka Reimers , Dominik Kriegner , Olena Gomonay , Dina Carbone , Filip Krizek , Vit Novák , Richard P. Campion , Francesco Maccherozzi , Alexander Bjorling , Oliver J. Amin , Luke X. Barton , Stuart F. Poole , Khalid A. Omari , Jan Michalička , Ondřej Man , Jairo Sinova , Tomáš Jungwirth , Peter Wadley , Sarnjeet S. Dhesi , Kevin W. Edmonds Nature Communications 13 DOI: 10.1038/s41467-022-28311-x Diamond Proposal Number(s): [22437, 2714] Open Access Show Abstract ▼ Abstract: Efficient manipulation of antiferromagnetic (AF) domains and domain walls has opened up new avenues of research towards ultrafast, high-density spintronic devices. AF domain structures are known to be sensitive to magnetoelastic effects, but the microscopic interplay of crystalline defects, strain and magnetic ordering remains largely unknown. Here, we reveal, using photoemission electron microscopy combined with scanning X-ray diffraction imaging and micromagnetic simulations, that the AF domain structure in CuMnAs thin films is dominated by nanoscale structural twin defects. We demonstrate that microtwin defects, which develop across the entire thickness of the film and terminate on the surface as characteristic lines, determine the location and orientation of 180∘ and 90∘ domain walls. The results emphasize the crucial role of nanoscale crystalline defects in determining the AF domains and domain walls, and provide a route to optimizing device performance.	Feb 2022

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I06-Nanoscience (XPEEM)

Defect-driven antiferromagnetic domain walls in CuMnAs films