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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Micromagnetic simulations of magnetization reversal in kagome artificial spin ice

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Velo, Murilo Ferreira [1] ; Cecchi, Breno Malvezzi [1] ; Pirota, Kleber Roberto [1]
Total Authors: 3
[1] Univ Estadual Campinas, Gleb Wataghin Inst Phys, BR-13083859 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Physical Review B; v. 102, n. 22 DEC 17 2020.
Web of Science Citations: 0

This work reports micromagnetic simulations used to study magnetization reversal in kagome artificial spin ice, taking into account the actual edge imperfections presented by the magnetic nanoislands as a source of disorder. An important advantage of the micromagnetic approach is to discretize a magnetic element in nanometric domains, allowing access to the sample magnetic moments distribution in detail. The limit case of zero disorder is accessed considering a system composed of perfect magnetic islands. The main result is the prediction of a critical angle between the applied magnetic field and the direction of one of the sublattices, above which Dirac strings emerge. For lower values, the reversal occurs through a bidimensional fashion, being smooth or abrupt depending on whether or not roughness is present, respectively. Finally, our simulations open the question of how the contour imperfections really influence the magnetic response of artificial spin ice. (AU)

FAPESP's process: 17/10581-1 - Emergent phenomena in reduced dimension systems
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants
FAPESP's process: 19/23317-6 - Spin waves in artificial spin ice formed by ferro- and antiferromagnets: a new magnonic crystal representative
Grantee:Breno Malvezzi Cecchi
Support type: Scholarships in Brazil - Doctorate (Direct)