%0 Conference Paper
%A Aldarawsheh, Amal
%A Fernandes, Imara Lima
%A Brinker, Sascha
%A Sallermann, Moritz
%A MuayadAbusaa5
%A Blügel, Stefan
%A Lounis, Samir
%T Emergence  of  zero-field  non-synthetic  single  and  catenated antiferromagnetic skyrmions in thin films
%M FZJ-2023-01753
%D 2022
%X Antiferromagnetic (AFM) skyrmions are envisioned as ideal localized topological magneticbits in future information technologies.  In contrast to ferromagnetic (FM) skyrmions, they are immune to the skyrmion Hall effect [1, 2], might offer potential terahertz dynamics [3] while being  insensitive  to  external  magnetic  fields  and  dipolar  interactions. Although  observed in synthetic AFM structures [4] and as complex meronic textures in intrinsic AFM bulk materials [5, 6] , their realization in non-synthetic AFM films, of crucial importance in racetrack concepts, has been elusive.  Here, we unveil their presence in a row-wise AFM Cr film deposited on PdFe bilayer grown on fcc Ir(111) surface. Using first principles, we demonstrate the emergence of single and strikingly interpenetrating catenated AFM skyrmions,  which can co-exist with the rich inhomogeneous exchange field, including that of FM skyrmions, hosted by PdFe. Besides the identification of an ideal platform of materials for intrinsic AFM skyrmions, we anticipate the uncovered knotted solitons to be promising building blocks in AFM spintronics.         [1] Barker, J. & Tretiakov, O. A., Physical review letters (2016).         [2] Zhang, X., Zhou, Y. & Ezawa, M., Scientific reports (2016).         [3] Gomonay, O., Baltz, V., Brataas, A. & Tserkovnyak, Y. Nature Physics (2018).         [4] Legrand, W., Maccariello, D., Ajejas, F., Collin, S., Vecchiola, A., Bouzehouane,               K., R eyren, N., Cros, V. & Fert, A., Nature materials (2020).         [5] Gao, S., Rosales, H., Gómez Albarracín, F. A., Tsurkan, V., Kaur, G., Fennell, T., ...                & Zaharko, O., Nature  (2020).         [6] Jani, H., Lin, J. C., Chen, J., Harrison, J., Maccherozzi, F., Schad, J., ... & Radaelli,                P. G., Nature (2021).
%B International Colloquium on Magnetic Films and Surfaces
%C 10 Jul 2022 - 15 Jul 2022, Okinawa (Japan)
Y2 10 Jul 2022 - 15 Jul 2022
M2 Okinawa, Japan
%F PUB:(DE-HGF)6
%9 Conference Presentation
%U https://juser.fz-juelich.de/record/1006620