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자연과학대학
물리학전공
Journal papers
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Engineering atomic-scale magnetic fields by dysprosium single atom magnets
Title
Engineering atomic-scale magnetic fields by dysprosium single atom magnets
Authors
Singha A.
;
Willke P.
;
Bilgeri T.
;
Zhang X.
;
Brune H.
;
Donati F.
;
Heinrich A.J.
;
Choi T.
Ewha Authors
Andreas Heinrich
;
최태영
;
Fabio Donati
SCOPUS Author ID
Andreas Heinrich
; 최태영
; Fabio Donati
Issue Date
2021
Journal Title
Nature Communications
ISSN
2041-1723
Citation
Nature Communications vol. 12, no. 1
Publisher
Nature Research
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
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. © 2021, The Author(s).
DOI
10.1038/s41467-021-24465-2
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