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

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

Organisation(s)
Physics of Functional Materials, Nanomagnetism and Magnonics, Research Platform MMM Mathematics-Magnetism-Materials
External organisation(s)
Los Alamos National Laboratory
Journal
npj Computational Materials
Volume
7
No. of pages
8
ISSN
2096-5001
DOI
https://doi.org/10.1038/s41524-021-00593-7
Publication date
08-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/tensionfree-dirac-strings-and-steered-magnetic-charges-in-3d-artificial-spin-ice(e83f8e5c-0e80-445d-81af-2117fe409a4e).html