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Engineering atomic-scale magnetic fields by dysprosium single atom magnets

Singha, A.; Willke, P. ORCID iD icon 1; Bilgeri, T.; Zhang, X.; Brune, H.; Donati, F.; Heinrich, A. J.; Choi, T.
1 Karlsruher Institut für Technologie (KIT)


Atomic scale engineering of magnetic fields is a key ingredient for miniaturizing quantum devices and precision control of quantum systems. This requires a unique combination of magnetic stability and spin-manipulation capabilities. Surface-supported single atom magnets offer such possibilities, where long temporal and thermal stability of the magnetic states can be achieved by maximizing the magnet/ic anisotropy energy (MAE) and by minimizing quantum tunnelling of the magnetization. Here, we show that dysprosium (Dy) atoms on magnesium oxide (MgO) have a giant MAE of 250 meV, currently the highest among all surface spins. Using a variety of scanning tunnelling microscopy (STM) techniques including single atom electron spin resonance (ESR), we confirm no spontaneous spin-switching in Dy over days at ≈ 1 K under low and even vanishing magnetic field. We utilize these robust Dy single atom magnets to engineer magnetic nanostructures, demonstrating unique control of magnetic fields with atomic scale tunability.

Verlagsausgabe §
DOI: 10.5445/IR/1000136093
Veröffentlicht am 09.08.2021
DOI: 10.1038/s41467-021-24465-2
Zitationen: 18
Web of Science
Zitationen: 13
Zitationen: 21
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000136093
Erschienen in Nature Communications
Verlag Nature Research
Band 12
Heft 1
Seiten 4179
Nachgewiesen in Dimensions
Web of Science
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