Tension-free Dirac strings and steered magnetic charges in 3D artificial spin ice

Sabri Koraltan (Corresponding author), Florian Slanovc, Florian Bruckner, Cristiano Nisoli, Andrii V. Chumak, Oleksandr V. Dobrovolskiy, Claas Abert, Dieter Suess

Publications: Contribution to journalArticlePeer Reviewed

Abstract

3D nano-architectures presents a new paradigm in modern condensed matter physics with numerous applications in photonics, biomedicine, and spintronics. They are promising for the realization of 3D magnetic nano-networks for ultra-fast and low-energy data storage. Frustration in these systems can lead to magnetic charges or magnetic monopoles, which can function as mobile, binary information carriers. However, Dirac strings in 2D artificial spin ices bind magnetic charges, while 3D dipolar counterparts require cryogenic temperatures for their stability. Here, we present a micromagnetic study of a highly frustrated 3D artificial spin ice harboring tension-free Dirac strings with unbound magnetic charges at room temperature. We use micromagnetic simulations to demonstrate that the mobility threshold for magnetic charges is by 2 eV lower than their unbinding energy. By applying global magnetic fields, we steer magnetic charges in a given direction omitting unintended switchings. The introduced system paves the way toward 3D magnetic networks for data transport and storage.
Original languageEnglish
Article number125
Number of pages8
Journalnpj Computational Materials
Volume7
Issue number1
DOIs
Publication statusPublished - 5 Aug 2021

Austrian Fields of Science 2012

  • 103018 Materials physics

Keywords

  • COULOMB PHASE
  • MONOPOLES
  • FRUSTRATION
  • DYNAMICS

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