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Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets

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Title
Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets
Author(s)
Fabio Donati; Pivetta, Marina; Christoph Wolf; Aparajita Singha; Wäckerlin, Christian; Baltic, Romana; Fernandes, Edgar; De Groot, Jean-Guillaume; Safa Lamia Ahmed; Persichetti, Luca; Nistor, Corneliu; Dreiser, Jan; Barla, Alessandro; Gambardella, Pietro; Brune, Harald; Rusponi, Stefano
Publication Date
2021-10
Journal
Nano Letters, v.21, no.19, pp.8266 - 8273
Publisher
American Chemical Society
Abstract
© Single atom magnets offer the possibility of magnetic information storage in the most fundamental unit of matter. Identifying the parameters that control the stability of their magnetic states is crucial to design novel quantum magnets with tailored properties. Here, we use X-ray absorption spectroscopy to show that the electronic configuration of dysprosium atoms on MgO(100) thin films can be tuned by the proximity of the metal Ag(100) substrate onto which the MgO films are grown. Increasing the MgO thickness from 2.5 to 9 monolayers induces a change in the dysprosium electronic configuration from 4f9 to 4f10. Hysteresis loops indicate long magnetic lifetimes for both configurations, however, with a different field-dependent magnetic stability. Combining these measurements with scanning tunneling microscopy, density functional theory, and multiplet calculations unveils the role of the adsorption site and charge transfer to the substrate in determining the stability of quantum states in dysprosium single atom magnets.
URI
https://pr.ibs.re.kr/handle/8788114/10648
DOI
10.1021/acs.nanolett.1c02744
ISSN
1530-6984
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > 1. Journal Papers (저널논문)
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