2026-06-08T01:16:16Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1057302025-03-18T15:05:17Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Sánchez Manzano, David author Orfila Rodríguez, Gloria author Sander, Anke author Marcano, Lourdes author Gallego Toledo, Fernando author Mawass, Mohamad-Assaad author Grilli, Francesco author Arora, Ashima author Peralta, Andrea author Cuéllar Jiménez, Fabian Andrés author Fernández Roldán, Jose A. author Reyren, NIcolas author Kronast, Florian author León Yebra, Carlos author Rivera Calzada, Alberto Carlos author Villegas, Javier E author Santamaría Sánchez-Barriga, Jacobo author Valencia, Sergio author 2024-04-02 Swirling spin textures, including topologically nontrivial states, such as skyrmions, chiral domain walls, and magnetic vortices, have garnered significant attention within the scientific community due to their appeal from both fundamental and applied points of view. However, their creation, controlled manipulation, and stability are typically constrained to certain systems with specific crystallographic symmetries, bulk or interface interactions, and/or a precise stacking sequence of materials. Recently, a new approach has shown potential for the imprint of magnetic radial vortices in soft ferromagnetic compounds making use of the stray field of YBa2Cu3O7-delta superconducting microstructures in ferromagnet/superconductor (FM/SC) hybrids at temperatures below the superconducting transition temperature (T-C). Here, we explore the lower size limit for the imprint of magnetic radial vortices in square and disc shaped structures as well as the persistence of these spin textures above T-C, with magnetic domains retaining partial memory. Structures with circular geometry and with FM patterned to smaller radius than the superconductor island facilitate the imprinting of magnetic radial vortices and improve their stability above T-C, in contrast to square structures where the presence of magnetic domains increases the dipolar energy. Micromagnetic modeling coupled with a SC field model reveals that the stabilization mechanism above T-C is mediated by microstructural defects. Superconducting control of swirling spin textures, and their stabilization above the superconducting transition temperature by means of defect engineering holds promising prospects for shaping superconducting spintronics based on magnetic textures SANCHEZ-MANZANO, David, et al. Size-dependence and high temperature stability of radial vortex magnetic textures imprinted by superconductor stray fields. ACS Applied Materials & Interfaces, 2024, vol. 16, no 15, p. 19681-19690. 1944-8244 10.1021/acsami.3c17671 https://hdl.handle.net/20.500.14352/105730 1944-8252 https://doi.org/10.1021/acsami.3c17671 https://pubs.acs.org/doi/10.1021/acsami.3c17671 Size-dependence and high temperature stability of radial vortex magnetic textures imprinted by superconductor stray fields