Portal de Periódicos da CAPES

Defect-driven antiferromagnetic domain walls in CuMnAs films

2022; Nature Portfolio; Volume: 13; Issue: 1 Linguagem: Inglês

10.1038/s41467-022-28311-x

2041-1723

Sonka Reimers, Dominik Kriegner, Olena Gomonay, Dina Carbone, Filip Křížek, V. Novák, R. P. Campion, Francesco Maccherozzi, Alexander Björling, O. J. Amin, Luke X. Barton, Stuart F. Poole, Khalid Omari, Jan Michalička, Ondřej Man, Jairo Sinova, T. Jungwirth, P. Wadley, S. S. Dhesi, K. W. Edmonds,

Multiferroics and related materials

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