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Engineering atomic-scale magnetic fields by dysprosium single atom magnets

Author

Listed:
  • A. Singha

    (Institute for Basic Science (IBS)
    Ewha Womans University
    Max Planck Institute for Solid State Research)

  • P. Willke

    (Institute for Basic Science (IBS)
    Ewha Womans University
    Karlsruhe Institute of Technology)

  • T. Bilgeri

    (École Polytechnique Fédérale de Lausanne)

  • X. Zhang

    (Institute for Basic Science (IBS)
    Ewha Womans University)

  • H. Brune

    (École Polytechnique Fédérale de Lausanne)

  • F. Donati

    (Institute for Basic Science (IBS)
    Ewha Womans University)

  • A. J. Heinrich

    (Institute for Basic Science (IBS)
    Ewha Womans University)

  • T. Choi

    (Institute for Basic Science (IBS)
    Ewha Womans University)

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.

Suggested Citation

  • A. Singha & P. Willke & T. Bilgeri & X. Zhang & H. Brune & F. Donati & A. J. Heinrich & T. Choi, 2021. "Engineering atomic-scale magnetic fields by dysprosium single atom magnets," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24465-2
    DOI: 10.1038/s41467-021-24465-2
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    Cited by:

    1. Stefano Reale & Jiyoon Hwang & Jeongmin Oh & Harald Brune & Andreas J. Heinrich & Fabio Donati & Yujeong Bae, 2024. "Electrically driven spin resonance of 4f electrons in a single atom on a surface," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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