| Issue |
EPJ Web Conf.
Volume 233, 2020
Portuguese Condensed Matter Physics National Conference (CMPNC 2019)
|
|
|---|---|---|
| Article Number | 05002 | |
| Number of page(s) | 6 | |
| Section | Thin films, Nanostructures, Artificially Structured Materials, Device Physics | |
| DOI | https://doi.org/10.1051/epjconf/202023305002 | |
| Published online | 16 April 2020 | |
https://doi.org/10.1051/epjconf/202023305002
Micromagnetic study of the vortex state in sub-micron iron discs
IFIMUP and DFA, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 1021/1055, Porto, Portugal
* Corresponding author: ludgero.peixoto@fc.up.pt
Published online: 16 April 2020
Magnetic nanostructures have been widely studied due to its poten¬tial applicability into several research fields such as data storage, sensing and biomedical applications. In this work, micromagnetic simulations (mumax3) of sub-micron iron discs are performed for different normalized inter-dot distance (distance/diameter), to better understand the magnetic behaviour of these nanos-tructures. Two sets of samples were studied: ideal circular discs and disc-shaped nanostructures (based on images of real samples). By analyzing the nucleation and annihilation fields and the magnetic susceptibility, it was found that the (ideal) discs could be considered as isolated for inter-dot distances greater than twice the raidus of the disc (2R). The difference in the shape of the disc-shaped nanostructures resulted in an in-plane anisotropy, noticeable on the hysteresis loops for different directions.
© The Authors, published by EDP Sciences, 2020
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