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Título: | Magnetic textures and singularities in ferri/ferromagnetic multilayers |
Autor: | Hermosa, Javier; Hierro-Rodríguez, Aurelio CSIC ORCID; Quirós, Carlos CSIC ORCID; Álvarez-Prado, L. M. CSIC ORCID; Sorrentino, Andrea; Valcárcel, Ricardo; Rehbein, Stefan; Pereiro, Eva; Martín, José Ignacio CSIC ORCID; Vélez, María CSIC ORCID; Ferrer, Salvador | Fecha de publicación: | 2021 | Editor: | Elsevier | Citación: | Journal of Magnetism and Magnetic Materials 539: 168384 (2021) | Resumen: | The stacking of ferrimagnetic and ferromagnetic films leads to a competition between magnetic interactions that can stabilize Bloch points and other singularities at the interfaces. In this work, GdxCo1-x/NdCo5/GdyCo1-y trilayers, with different thicknesses, have been prepared. By tuning the stoichiometry of the Gd-Co outer layers, the Co magnetic sublattice dominates in one layer, whereas the opposite side is Gd dominated. In this way, in-depth magnetization domain walls can be created due to the balance between exchange and magnetostatic interactions. In addition, the weak perpendicular magnetic anisotropy of the Nd-Co central layer induces a stripe domain pattern, supporting the formation of Bloch points, meron-like textures, and vortex-antivortex pairs. The interaction between both types of structures, in-depth domain walls and magnetic singularities, has been studied by a combination of macroscopic Magneto-Optical Kerr Effect and Vibrating Sample Magnetometry measurements with microscopic Magnetic Force Microscopy and element selective magnetic Transmission soft X-ray Microscopy imaging. The results confirm marked changes in the magnetic properties of the trilayers, as compared with those single NdCo5 films, and the formation of complex magnetic textures, associated with partial magnetization reversal, where magnetic singularities are formed. | Versión del editor: | https://doi.org/10.1016/j.jmmm.2021.168384 | URI: | http://hdl.handle.net/10261/259142 | DOI: | 10.1016/j.jmmm.2021.168384 | ISSN: | 0304-8853 |
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