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

Fabio Donati; Marina Pivetta; Christoph Wolf; Aparajita Singha; Christian Wäckerlin; Romana Baltic; Edgar Fernandes; Jean Guillaume De Groot; Safa Lamia Ahmed; Luca Persichetti; Corneliu Nistor; Jan Dreiser; Alessandro Barla; Pietro Gambardella; Harald Brune; Stefano Rusponi

doi:10.1021/acs.nanolett.1c02744

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

Fabio Donati, Marina Pivetta, Christoph Wolf, Aparajita Singha, Christian Wäckerlin, Romana Baltic, Edgar Fernandes, Jean Guillaume De Groot, Safa Lamia Ahmed, Luca Persichetti, Corneliu Nistor, Jan Dreiser, Alessandro Barla, Pietro Gambardella, Harald Brune, Stefano Rusponi

Department of Physics

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

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.

Original language	English
Pages (from-to)	8266-8273
Number of pages	8
Journal	Nano Letters
Volume	21
Issue number	19
DOIs	https://doi.org/10.1021/acs.nanolett.1c02744
State	Published - 13 Oct 2021

Bibliographical note

Publisher Copyright:
© 2021 American Chemical Society.

Keywords

Single atom magnets
X-ray magnetic circular dichroism
density functional theory
lanthanides
multiplet calculations
scanning tunneling microscopy

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10.1021/acs.nanolett.1c02744

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Donati, F., Pivetta, M., Wolf, C., Singha, A., Wäckerlin, C., Baltic, R., Fernandes, E., De Groot, J. G., Ahmed, S. L., Persichetti, L., Nistor, C., Dreiser, J., Barla, A., Gambardella, P., Brune, H., & Rusponi, S. (2021). Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets. Nano Letters, 21(19), 8266-8273. https://doi.org/10.1021/acs.nanolett.1c02744

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title = "Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets",

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.",

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author = "Fabio Donati and Marina Pivetta and Christoph Wolf and Aparajita Singha and Christian W{\"a}ckerlin and Romana Baltic and Edgar Fernandes and {De Groot}, {Jean Guillaume} and Ahmed, {Safa Lamia} and Luca Persichetti and Corneliu Nistor and Jan Dreiser and Alessandro Barla and Pietro Gambardella and Harald Brune and Stefano Rusponi",

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Donati, F, Pivetta, M, Wolf, C, Singha, A, Wäckerlin, C, Baltic, R, Fernandes, E, De Groot, JG, Ahmed, SL, Persichetti, L, Nistor, C, Dreiser, J, Barla, A, Gambardella, P, Brune, H & Rusponi, S 2021, 'Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets', Nano Letters, vol. 21, no. 19, pp. 8266-8273. https://doi.org/10.1021/acs.nanolett.1c02744

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AU - Wolf, Christoph

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AU - Wäckerlin, Christian

AU - Baltic, Romana

AU - Fernandes, Edgar

AU - De Groot, Jean Guillaume

AU - Ahmed, Safa Lamia

AU - Persichetti, Luca

AU - Nistor, Corneliu

AU - Dreiser, Jan

AU - Barla, Alessandro

AU - Gambardella, Pietro

AU - Brune, Harald

AU - Rusponi, Stefano

PY - 2021/10/13

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N2 - 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.

AB - 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.

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ER -

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

Abstract

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Keywords

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