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Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets
- Title
- Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets
- Authors
- Donati, Fabio; Pivetta, Marina; Wolf, Christoph; Singha, Aparajita; Waeckerlin, Christian; Baltic, Romana; Fernandes, Edgar; De Groot, Jean-Guillaume; Ahmed, Safa Lamia; Persichetti, Luca; Nistor, Corneliu; Dreiser, Jan; Barla, Alessandro; Gambardella, Pietro; Brune, Harald; Rusponi, Stefano
- Ewha Authors
- Fabio Donati; Christoph Wolf
- SCOPUS Author ID
- Fabio Donati; Christoph Wolf
- Issue Date
- 2021
- Journal Title
- NANO LETTERS
- ISSN
- 1530-6984
1530-6992
- Citation
- NANO LETTERS vol. 21, no. 19, pp. 8266 - 8273
- Keywords
- Single atom magnets; lanthanides; X-ray magnetic circular dichroism; scanning tunneling microscopy; density functional theory; multiplet calculations
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- 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 4f(9) to 4f(10). 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.
- DOI
- 10.1021/acs.nanolett.1c02744
- Appears in Collections:
- 연구기관 > 양자나노과학연구소 > Journal papers
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