| Autor: |
Sanchez-Manzano D; Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France.; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Orfila G; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Sander A; Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France., Marcano L; Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany.; Department of Physics, Faculty of Science, University of Oviedo, 33007 Oviedo, Spain.; Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramón 194, 20014 Donostia-San Sebastián, Spain., Gallego F; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Mawass MA; Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany., Grilli F; Institute for Technical Physics Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany., Arora A; Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany., Peralta A; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Cuellar FA; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Fernandez-Roldan JA; Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany., Reyren N; Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France., Kronast F; Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany., Leon C; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Rivera-Calzada A; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Villegas JE; Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France., Santamaria J; GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain., Valencia S; Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany. |
| Abstrakt: |
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 YBa 2 Cu 3 O 7-δ 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. |
