Science Daily April 17, 2024
In spintronics the generation and stabilization of most of the magnetic textures is restricted to a few materials and achievable under very specific conditions (temperature, magnetic field…). 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-δ superconducting microstructures in ferromagnet/superconductor (FM/SC) hybrids at temperatures below the superconducting transition temperature (TC). Using a new approach an international team of researchers (France, Spain, Germany) explored 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 TC, with magnetic domains retaining partial memory. Structures with circular geometry and with FM patterned to smaller radius than the superconductor island facilitated the imprinting of magnetic radial vortices and improved their stability above TC, in contrast to square structures where the presence of magnetic domains increases the dipolar energy. They showed that the stabilization mechanism above TC was mediated by microstructural defects. According to the researchers their work holds promising prospects for shaping superconducting spintronics based on magnetic textures… read more. Open Access TECHNICAL ARTICLE
Graphical abstract. Credit: ACS Appl. Mater. Interfaces 2024, 16, 15, 19681–19690, April 2, 2024Â