Tunable and switchable magnetic dipole patterns in nanostructured superconductors

Jun-Yi Ge (), Vladimir N. Gladilin, Jacques Tempere, Jozef T. Devreese and Victor V. Moshchalkov ()
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Jun-Yi Ge: Shanghai University
Vladimir N. Gladilin: INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven
Jacques Tempere: TQC-Theory of Quantum and Complex Systems, Universiteit Antwerpen
Jozef T. Devreese: TQC-Theory of Quantum and Complex Systems, Universiteit Antwerpen
Victor V. Moshchalkov: INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Design and manipulation of magnetic moment arrays have been at the focus of studying the interesting cooperative physical phenomena in various magnetic systems. However, long-range ordered magnetic moments are rather difficult to achieve due to the excited states arising from the relatively weak exchange interactions between the localized moments. Here, using a nanostructured superconductor, we investigate a perfectly ordered magnetic dipole pattern with the magnetic poles having the same distribution as the magnetic charges in an artificial spin ice. The magnetic states can simply be switched on/off by applying a current flowing through nanopatterned area. Moreover, by coupling magnetic dipoles with the pinned vortex lattice, we are able to erase the positive/negative poles, resulting in a magnetic dipole pattern of only one polarity, analogous to the recently predicted vortex ice. These switchable and tunable magnetic dipole patterns open pathways for the study of exotic ordering phenomena in magnetic systems.

Date: 2018
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DOI: 10.1038/s41467-018-05045-3

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