109545 20240319080947.0 doi 10.1038/s41565-021-01027-7 sideral 125990 ART-2022-125990 eng Donnelly, C Complex free-space magnetic field textures induced by three-dimensional magnetic nanostructures 2022 Access copy available to the general public Unrestricted The design of complex, competing effects in magnetic systems-be it via the introduction of nonlinear interactions(1-4), or the patterning of three-dimensional geometriesm-is an emerging route to achieve new functionalities. In particular, through the design of three-dimensional geometries and curvature, intrastructure properties such as anisotropy and chirality, both geometry-induced and intrinsic, can be directly controlled, leading to a host of new physics and functionalities, such as three-dimensional chiral spin states(7), ultrafast chiral domain wall dynamicss(8-10) and spin textures with new spin topologies(7, 11). Here, we advance beyond the control of intrastructure properties in three dimensions and tailor the magnetostatic coupling of neighbouring magnetic structures, an interstructure property that allows us to generate complex textures in the magnetic stray field. For this, we harness direct write nanofabrication techniques, creating intertwined nanomagnetic cobalt double helices, where curvature, torsion, chirality and magnetic coupling are jointly exploited. By reconstructing the three-dimensional vectorial magnetic state of the double helices with soft-X-ray magnetic laminography(12, 13), we identify the presence of a regular array of highly coupled locked domain wall pairs in neighbouring helices. Micromagnetic simulations reveal that the magnetization configuration leads to the formation of an array of complex textures in the magnetic induction, consisting of vortices in the magnetization and antivortices in free space, which together form an effective B field cross-tie wall''s. The design and creation of complex three-dimensional magnetic field nanotextures opens new possibilities for smart materials(15), unconventional computing(2, 16), particle trapping(17, 18) and magnetic imaging(19). info:eu-repo/grantAgreement/EC/H2020/701647/EU/International, Interdisciplinary and Intersectoral Postdocs/PSI-FELLOW-II-3i This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 701647-PSI-FELLOW-II-3i info:eu-repo/grantAgreement/EC/H2020/746958/EU/Perpendicular Magnetic Anisotropy: from Topological Defects to Reconfigurable Magnetic Devices/MAGTOPRECON This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 746958-MAGTOPRECON info:eu-repo/grantAgreement/ES/MINECO-AEI/PID2019-104009RB-I00-AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 38.3 2022 NANOSCIENCE & NANOTECHNOLOGY 2 / 107 = 0.019 2022 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 5 / 343 = 0.015 2022 Q1 T1 13.141 2022 Atomic and Molecular Physics, and Optics 2022 Q1 Bioengineering 2022 Q1 Biomedical Engineering 2022 Q1 Nanoscience and Nanotechnology 2022 Q1 Electrical and Electronic Engineering 2022 Q1 Materials Science (miscellaneous) 2022 Q1 Condensed Matter Physics 2022 Q1 54.6 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Hierro-Rodriguez, A Abert, C Witte, K Skoric, L Sanz-Hernandez, D Finizio, S Meng, FF McVitie, S Raabe, J Suess, D Cowburn, R Fernandez-Pacheco, A Universidad de Zaragoza (orcid)0000-0002-4303-9525 2004 398 Universidad de Zaragoza Dpto. Física Teórica Área Física de la Tierra 17 (2022), 136–142 Nat. Nanotechnol. NATURE NANOTECHNOLOGY 1748-3387 4028853 http://zaguan.unizar.es/record/109545/files/texto_completo.pdf Versión publicada 3568634 http://zaguan.unizar.es/record/109545/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:109545 articulos driver 2024-03-18-12:42:30 ARTICLE