Lanthanide metal–organic network featuring strong perpendicular magnetic anisotropy

The coordination of lanthanides atoms in two-dimensional surface-confined metal-organic networks is a promising path to achieve an ordered array of single atom magnets. These networks are highly versatile with plenty of combinations of molecular linkers and metallic atoms. Notably, with an appropriate choice of molecules and lanthanide atoms it should be feasible to tailor the orientation and intensity of the magnetic anisotropy. However, up to now only tilted and almost in-plane easy axis of magnetizations were reported in lanthanide-based architectures. Here we introduce an Er-directed two-dimensional metallosupramolecular network on Cu(111) featuring strong out-of-plane magnetic anisotropy. Our results will contribute to pave avenues for the use of lanthanides in potential applications in nanomagnetism and spintronics.This work received funding from the European Research Council (ERC, grant 766555), Marie Sklodowska-Curie Actions (MSCA, project 894924) under the European Union's Horizon 2020 Research and Innovation Programme, and the EMPIR Programme co-financed by the Participating States and the European and Union's Horizon 2020 Research and Innovation Programme (grant EMPIR 20FUN03 COMET). IMDEA Nanociencia acknowledges support from the “Severo Ochoa” Programme for Centres of Excellence in R&D (MINECO, Grant SEV-2016-0686). The ALBA synchrotron is acknowledged for providing beam time at BOREAS beamline (proposal number 2021025028).Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2nr07189dPeer reviewe

Two-dimensional Co-directed metal-organic networks featuring strong antiferromagnetism and perpendicular anisotropy

Antiferromagnetic spintronics is a rapidly emerging field with the potential to revolutionize the way we store and process information. One of the key challenges in this field is the development of novel two-dimensional antiferromagnetic materials. In this paper, we report the first on-surface synthesis of a Co-directed metal-organic network in which the Co atoms are strongly antiferromagnetically coupled, while featuring a perpendicular magnetic anisotropy. This material is a promising candidate for future antiferromagnetic spintronic devices, as it combines the advantages of twodimensionality and metal-organic chemistry with strong antiferromagnetic order and perpendicular magnetic anisotropy.Peer reviewe

On‐Surface Synthesis of Organolanthanide Sandwich Complexes

Abstract The synthesis of lanthanide‐based organometallic sandwich compounds is very appealing regarding their potential for single‐molecule magnetism. Here, it is exploited by on‐surface synthesis to design unprecedented lanthanide‐directed organometallic sandwich complexes on Au(111). The reported compounds consist of Dy or Er atoms sandwiched between partially deprotonated hexahydroxybenzene molecules, thus introducing a distinct family of homoleptic organometallic sandwiches based on six‐membered ring ligands. Their structural, electronic, and magnetic properties are investigated by scanning tunneling microscopy and spectroscopy, X‐ray absorption spectroscopy, X‐ray linear and circular magnetic dichroism, and X‐ray photoelectron spectroscopy, complemented by density functional theory‐based calculations. Both lanthanide complexes self‐assemble in close‐packed islands featuring a hexagonal lattice. It is unveiled that, despite exhibiting analogous self‐assembly, the erbium‐based species is magnetically isotropic, whereas the dysprosium‐based compound features an in‐plane magnetization

Data - Lanthanide metal–organic network featuring strong perpendicular magnetic anisotropy

(i) Multiplet calculations for TDA+Er; (ii) Point charges for multiplet calculations for TDA+Er; (iii) STM images; (iv) STS data; (v) XAS, XMCD and XLD data for TDA+E