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Emergence of zero-field non-synthetic single and interchained antiferromagnetic skyrmions in thin films

Author

Listed:
  • Amal Aldarawsheh

    (Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA
    University of Duisburg-Essen and CENIDE)

  • Imara Lima Fernandes

    (Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA)

  • Sascha Brinker

    (Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA)

  • Moritz Sallermann

    (Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA
    RWTH Aachen University
    University of Iceland)

  • Muayad Abusaa

    (Arab American University)

  • Stefan Blügel

    (Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA)

  • Samir Lounis

    (Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA
    University of Duisburg-Essen and CENIDE)

Abstract

Antiferromagnetic (AFM) skyrmions are envisioned as ideal localized topological magnetic bits in future information technologies. In contrast to ferromagnetic (FM) skyrmions, they are immune to the skyrmion Hall effect, might offer potential terahertz dynamics while being insensitive to external magnetic fields and dipolar interactions. Although observed in synthetic AFM structures and as complex meronic textures in intrinsic AFM bulk materials, their realization in non-synthetic AFM films, of crucial importance in racetrack concepts, has been elusive. Here, we unveil their presence in a row-wise AFM Cr film deposited on PdFe bilayer grown on fcc Ir(111) surface. Using first principles, we demonstrate the emergence of single and strikingly interpenetrating chains of AFM skyrmions, which can co-exist with the rich inhomogeneous exchange field, including that of FM skyrmions, hosted by PdFe. Besides the identification of an ideal platform of materials for intrinsic AFM skyrmions, we anticipate the uncovered knotted solitons to be promising building blocks in AFM spintronics.

Suggested Citation

  • Amal Aldarawsheh & Imara Lima Fernandes & Sascha Brinker & Moritz Sallermann & Muayad Abusaa & Stefan Blügel & Samir Lounis, 2022. "Emergence of zero-field non-synthetic single and interchained antiferromagnetic skyrmions in thin films," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35102-x
    DOI: 10.1038/s41467-022-35102-x
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