Correlation between Electronic Configuration and Magnetic Stability in Dysprosium Single Atom Magnets
- 주제(키워드) Single atom magnets , lanthanides , X-ray magnetic circular dichroism , scanning tunneling microscopy , density functional theory , multiplet calculations
- 주제(기타) Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
- 설명문(일반) [Pivetta, Marina; Waeckerlin, Christian; Baltic, Romana; Fernandes, Edgar; De Groot, Jean-Guillaume; Brune, Harald; Rusponi, Stefano] Ecole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland; [Donati, Fabio; Wolf, Christoph; Singha, Aparajita; Ahmed, Safa Lamia] Inst Basic Sci IBS, Ctr Quantum Nanosci, Seoul 03760, South Korea; [Wolf, Christoph; Singha, Aparajita] Ewha Womans Univ, Seoul 03760, South Korea; [Singha, Aparajita] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany; [Waeckerlin, Christian] Empa Swiss Fed Labs Mat Res & Technol, Surface Sci & Coating Technol, CH-8600 Dubendorf, Switzerland; [Donati, Fabio; Ahmed, Safa Lamia] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Persichetti, Luca; Nistor, Corneliu; Gambardella, Pietro] Swiss Fed Inst Technol, Dept Mat, CH-8093 Zurich, Switzerland; [Persichetti, Luca] Roma Tre Univ, Dept Sci, I-00146 Rome, Italy; [Dreiser, Jan] Paul Scherrer Inst PSI, Swiss Light Source SLS, CH-5232 Villigen, Switzerland; [Barla, Alessandro] CNR, Ist Struttura Mat ISM, I-34149 Trieste, Italy
- 등재 SCIE, SCOPUS
- OA유형 Green Submitted
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000183722
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acs.nanolett.1c02744
- PubMed https://pubmed.ncbi.nlm.nih.gov/34569802
초록/요약
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.
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