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MA: Fachverband Magnetismus
MA 15: Poster I
MA 15.10: Poster
Dienstag, 18. März 2025, 10:00–12:30, P1
Sensing the Spin States of Individual Lanthanide Atoms on a surface — •Kyungju Noh1,2,3, Gregory Czap3, Jairo Velasco Jr.3,4, Roger M. Macfarlane3, Harald Brune3,5, and Christopher P. Lutz3 — 1Center for Quantum 467 Nanoscience (QNS), Institute of Basic Science (IBS), Seoul 468 03760, Republic of Korea — 2Department of Physics, Ewha 469 Womans University, Seoul 03760, Republic of Korea — 3IBM Almaden Research Center, San Jose, 466 California 95120, United States — 4Department of Physics, 472 University of California, Santa Cruz, California 95064, 473 United States — 5Institute of Physics, Ecole 458 Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH- 459 1015, Switzerland
Research on single atoms and molecules of lanthanide elements has become a focal point in materials science due to their exceptional magnetic and electronic properties arising from the 4f shell electrons.
Here, we introduce the magnetic property of individual Samarium (Sm) and Europium (Eu) atoms, which has nearly half-filled and half-filled 4f shell each, adsorbed on various binding sites of a MgO thin film. Using electron spin resonance scanning tunneling microscopy (ESR-STM), we analyze the spin structures of Sm and Eu on different binding sites. Titanium (Ti), a well-established atom, serves as a spin sensor to detect interactions with the lanthanide atoms. Our comparison across binding sites reveals distinct spin characteristics of the lanthanides on a surface, which further opens a way to implement lanthanide atoms to quantum devices.
Keywords: ESR-STM; lanthanide magnetism; quantum magnetism; spin sensing