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O: Fachverband Oberflächenphysik
O 30: Surface Magnetism
O 30.8: Vortrag
Dienstag, 18. März 2025, 12:30–12:45, H11
Emergence of Ferromagnetism in 3d-4f Hetero-Bimetallic Surface-Architectures — •Massine Kelai1, Serim Jeon1, Dasom Choi1, Corina Urdaniz1, Pierre Josse1, Jaehyun Lee1, Stefano Reale1, Yongwoo Kim1, Weibin Li2, Pierluigi Gargiani2, Woo-Suk Noh3, Dominik Lungerich4, Christoph Wolf1, Fabio Donati1, and Lucinao Colazzo1 — 1Center for Quantum Nanoscience, Institute for Basic Science, Seoul, Republic of Korea — 2ALBA Synchrotron Light Source, 08290 Catalonia, Spain — 3MPPC/CPM, Max Planck POSTECH, Pohang 37673, Republic of Korea — 4Center for Nanomedicine, Institute for Basic Science (IBS), 50 Yonsei-ro, Seodaemun-gu, 03722 Seoul, Republic of Korea
Surface-confined metal-organic coordination networks (SMONs) are emerging platforms for designing tunable low-dimensional nanostructures, with 3d-4f hetero-bimetallic systems being promising candidates for high-density memory and qubit applications. However, the mechanisms underlying their formation and magnetic interactions remain largely unexplored. Here, we investigate a novel 3d-4f SMON, Dy-FeTCPP (TCPP = 5,10,15,20-(tetra-4-cyanophenyl)porphyrin), formed on Au(111) via on-surface chemical reaction pathways. Using X-ray absorption spectroscopy, magnetic circular dichroism, scanning tunneling spectroscopy, and density functional theory, we show that lanthanide insertion induces strong substrate-mediated ferromagnetic coupling between 3d units, driven by porphyrin core deformation upon Dy-cyanophenyl bonding. This work advances the understanding of SMONs, paving the way for scalable quantum devices on surfaces.
Keywords: Ferromagnetic Interactions; Surface-confined Metal-Organic Networks; Lanthanides and transition metals; X-ray magnetic circular dichroism; Quantum devices