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

Koraltan, Sabri; Slanovc, Florian; Bruckner, Florian; Nisoli, Cristiano; Chumak, Andrii V.; Dobrovolskiy, Oleksandr V.; Abert, Claas; Suess, Dieter

doi:10.1038/s41524-021-00593-7

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

Journal Article · 05 August 2021 · npj Computational Materials

DOI: https://doi.org/10.1038/s41524-021-00593-7 · OSTI ID:1820085

^[1]; Slanovc, Florian ^[1]; Bruckner, Florian ^[1];

^[2];

^[1];

^[1]

Univ. of Vienna (Austria)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: Austrian Science Fund (FWF); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1820085

Report Number(s):: LA-UR--21-21222

Journal Information:: npj Computational Materials, Journal Name: npj Computational Materials Journal Issue: 1 Vol. 7; ISSN 2057-3960

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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