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19 April 2024 |
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Article overview
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Defect-driven antiferromagnetic domain walls in CuMnAs films | | Sonka Reimers
; Dominik Kriegner
; Olena Gomonay
; Dina Carbone
; Filip Krizek
; Vit Novak
; Richard P. Campion
; Francesco Maccherozzi
; Alexander Bjorling
; Oliver J. Amin
; Luke X. Barton
; Stuart F. Poole
; Khalid A. Omari
; Jan Michalicka
; Ondrej Man
; Jairo Sinova
; Tomas Jungwirth
; Peter Wadley
; Sarnjeet S. Dhesi
; Kevin W. Edmonds
; | | Date: |
7 Oct 2021 | | 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 degree and 90 degree 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. | | Source: | arXiv, 2110.03724 | | Services: | Forum | Review | PDF | Favorites | |
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